Database Users

How to unroot and get locked bootloader again

Hi, I rooted my tablet about 2 months ago - Now I have root and TWRP. Now I need to remove root and put a stock image with locked bootloader.
Do you think I can do it by my own? (for example, with fastboot?)
Many thanks
Daniela

Huawei Mediapad M3 - Unroot - Lock bootloader
danibyte27 said:
Hi, I rooted my tablet about 2 months ago - Now I have root and TWRP. Now I need to remove root and put a stock image with locked bootloader.
Do you think I can do it by my own? (for example, with fastboot?)
Many thanks
Daniela
Click to expand...
Click to collapse
Hi,
You can achieve this by following methods.
Method 1
Since you have TWRP
you can flash the stock firmware from TWRP and it should lock the bootloader, unroot and then overwrite the twrp with stock recovery.
What you need?
For this method you need the stock firmware zip files and firmware finder app from google store.
Method 2 (risky, not recommended)
Download SRK tools by somboons
From here https://forum.xda-developers.com/showpost.php?p=66627615&postcount=2
Unzip the file
Open the application
Then on the main screen, you will have plenty of options to type 1, 2, 3, etc..
Just type 000 to enter the command prompt here.
Once you are in that command prompt you can type the adb commands.
to lock the bootloader you need to type
fastboot oem relock xxxxxxx (just check this command. I think
xxxxx is your bootloader unlock code (yes you have to use the unlock code here again)
this will relock the bootloader.
now to unroot
you can just flash stock firmware using dload method.
How?
download the stock firmware
extract the update.app
put this update.app in a dload folder in sdcard.
you have to create this folder on sdcard and name it as dload.
then you can use the code from dialer pad
*#*#2846579#*#*
from there select SDcard upgrade.
It will reboot and flash the stock firmware. You no longer have root. It will also overwrite the twrp recovery with stock recovery.
I would recommend the method 1. It is safe, easy and should complete the desired tasks within no time.
Method 2 has lot of steps and there is risk involved so I cannot recommend this procedure as confidently as the first one.
I have the Huawei Mediapad M3 LTE version and also Huawei Mate 8. There are few similar functions in Huawei devices.
So now the question is where you will find the stock firmware?
You can find the stock firmwares using firmware finder app in google store.
From here -> https://play.google.com/store/apps/details?id=com.teammt.gmanrainy.huaweifirmwarefinder&hl=en
Install the app.
Open the app
It will automatically find the right firmware's by detecting your tablet model.
All links might not work
So check the one that is working and download that firmware - preferably full firmware.
You will get the zip files if there are two or just one.
then you can follow the method 1.
Hope this works out for you. Hope you find this information useful. :good::good::good:

Hi and many thanks for your kind response!! I tried as you adviced, the problem is that now i have a custom rom and this is the reason, I suppose, for which, every firmware i try to flash, it says "this version is not compatible with the one installed". For what you know, is there a way to flash the firmware without it to check the one already installed?
Thankssss again!!
Daniela

Installing Stock Rom - Huawei Mediapad M3
danibyte27 said:
Hi and many thanks for your kind response!! I tried as you adviced, the problem is that now i have a custom rom and this is the reason, I suppose, for which, every firmware i try to flash, it says "this version is not compatible with the one installed". For what you know, is there a way to flash the firmware without it to check the one already installed?
Thankssss again!!
Daniela
Click to expand...
Click to collapse
Hi,
Can you give me more details about your tablet ? It will be in settings - > about device
like
tablet version - is it BTV-DL09 or BTV-DW09?
DL09 is the LTE version
W - is the wifi version
which OS are you running currently?
TWRP version ?
How did you try to flash ? When method did you follow?
I don't know if there is a way to check what you are asking. But we can certainly resolve your issue.
When I was flashing and experimenting on my Huawei Mate 8 last week I came across similar errors. That time I had to dload rollback package from SDcard and then I flashed the EMUI4.1 OS to get back to stock. Now I feel that is the case with your tablet too.
Process is same for both devices. But the files used to flash are different (naturally). That is why I am confident that we can try to come up with a solution.
Point to note
to flash stock rom, the following play a key role.
1) bootlocker - locked
2) recovery - stock
3) Rollback package ( this was really file for Huawei Mate 8, but is it important for Huawei Mediapad M3? I will try to find out).
At the moment, you have custom OS and custom recovery.
so best thing to do is flash the Stock ROM zip files from TWRP. I explained why it is better to do it this way.
Were you able to get the stock rom zip files?
Also please answer all the questions in this post so that I can help you better. :good::good::good::good::good:

Hi Sama, below in bold my answers.
Samavb said:
Hi,
Can you give me more details about your tablet ? It will be in settings - > about device
like
tablet version - is it BTV-DL09 or BTV-DW09?
It's the LTE version, BTV-DL09
which OS are you running currently?
Android 6.0, EMUI 4,1, Greatslon mod B030
TWRP version ?
Twrp doesn't start anymore and so did root. This happens since yesterday, after installing the custom rom.
How did you try to flash ? When method did you follow?
I installed firmware finder and tried the following firmwares :
BTV-DL09C233B332, 1273 MB, OTA
BTV-DL09C233B035, 173 MB, OTA
BTV-DL09C233B030, 1801 MB, FULL
and always I get the same response : your firmware version is not compatible - upgrade failed.
I don't know if there is a way to check what you are asking. But we can certainly resolve your issue.
When I was flashing and experimenting on my Huawei Mate 8 last week I came across similar errors. That time I had to dload rollback package from SDcard and then I flashed the EMUI4.1 OS to get back to stock. Now I feel that is the case with your tablet too.
Process is same for both devices. But the files used to flash are different (naturally). That is why I am confident that we can try to come up with a solution.
Point to note
to flash stock rom, the following play a key role.
1) bootlocker - locked
2) recovery - stock
3) Rollback package ( this was really file for Huawei Mate 8, but is it important for Huawei Mediapad M3? I will try to find out).
The bootloader is still unlocked. Do I need the unlock code, in order to lock it again?
At the moment, you have custom OS and custom recovery.
so best thing to do is flash the Stock ROM zip files from TWRP. I explained why it is better to do it this way.
I'm not sure that I still have custom recovery, cause I cannot go into it anymore...
Were you able to get the stock rom zip files?
Also please answer all the questions in this post so that I can help you better. :good::good::good::good::good:
Click to expand...
Click to collapse
Many many thanks again!!!!!!
Dany

Steps
danibyte27 said:
Hi Sama, below in bold my answers.
Many many thanks again!!!!!!
Dany
Click to expand...
Click to collapse
ok
so your root doesn't seem to work
you don't know if you have custom recovery
you are using EMUI 4.1
1) do the factor reset from the settings > go to -> Settings -> Advanced settings - > backup & reset - > factory data reset
do this - it should take few minutes
2) then -> developer options - > turn on "oem unlock" and " usb debugging " - on
3) please download the srk tools - I think I gave you the link to that software in my previous posts - > please download - extract keep it ready.
4) open the SRK tools - > type 000 in the place where it asks you to type 1 or 2 or 3 .. - you should get command prompt
5) Now press volume down button and hold .. and then connect your tablet to computer ( you have to enter bootloader mode)
6) now we need to lock the bootloader - so run the adb command ( for this you need to put the tablet in bootloader mode )
fastboot oem relock xxxxxxx or fastboot oem lock xxxxxxx
yes you will need the unlock code and in the above command replace the xxxxxx with your unlock code.
lock your bootloader.
7) it will do factory reset - and then your bootloader is locked.
Now at this point you have bootloader locked and you have normal firmware but since you want to go back to stock rom
I am still not clear about the build number. Can you give me the build number ? its in settings - > about tablet - > mine is BTV-DL09C100B006
Model number you and I have the same version. BTV-DL09. But it is the build number which matters.
I checked the firmware finder - unfortunately it is not giving the full firmware - only ota updates.
so the factory reset in the first step above is very very crucial.
The other safe way to get the firmware is through Hisuite
for this you need Hisuite software - you can either go forward to B009 or if it is giving you that option to switch to earlier version then you can go back. But I highly doubt it will give anything. So just try to go forward with B009 ROM.
try all these steps... see if you can succeed to any extent. In the mean time I will try to search for full firmware and if I do I will update this reply or give a new reply.
My name is Sam Hope this works out for you. Don't worry if this doesn't work then we will think about alternatives. But these are very important steps. Good luck. :good::good::good::good::good:
Cheers!
Sam
Update: After going through some of the threads on xda I came across one russian website
http://4pda.ru/forum/index.php?showtopic=780572&st=0#entry54523165
you can check the firmwares. They are all custom firmwares. But I am not sure if the version is compatible. check if your tablet buildnumber is BTV-DL09C100B006 or BTV-DL09C233XXX . that is something you need to be careful.
update2 :- http://hwmt.ru/oth/HWFF/info/view.php
this link contains all stock firmwares - but they are all OTA and not Full package.

I have the US version (I believe it is distinguished as BTV-W09C128Bxxx). Using the firmware finder, it appears the only old firmware available for my build is B001_demo and it's only an OTA. If my goal is restore stock recovery, will downloading this and flashing this do anything? I currently have greatslon's TWRP rooted running stock firmware version BTV-W09C128B002. Thanks!

Btv-w09c128xxx
asianpianoman said:
I have the US version (I believe it is distinguished as BTV-W09C128Bxxx). Using the firmware finder, it appears the only old firmware available for my build is B001_demo and it's only an OTA. If my goal is restore stock recovery, will downloading this and flashing this do anything? I currently have greatslon's TWRP rooted running stock firmware version BTV-W09C128B002. Thanks!
Click to expand...
Click to collapse
if you check this Russian site
http://hwmt.ru/oth/HWFF/info/view.php
you will find 8 matches for your model.
unfortunately, all are OTA and not full firmware. OTA is good for updating from lower version to higher version. But for downgrading or returning to stock I am not sure. In my experience, I always used the FULL package.
your current situation
1) you have TWRP
2) Rooted ( so bootloader unlocked)
your options
1) Returning to stock seems to be difficult. Only possible way is Hisuite but it won't recognize your device as your tablet is rooted and bootloader unlocked.
To return to stock
a) you need stock recovery ( you will get this once you flash Stock rom in twrp or through erecovery - download stock rom)
b) bootloader locked (this is possible by adb commands using SRK tools )
c) Stock rom (this is the problem - I couldn't find a single site which is hosting FULL stock rom )
d) rollback package ( If there is one, Huawei had it for Huawei mate 8 but for mediapad m3, does it have? I don't know) - I hope this is not mandatory. We should be able to get the job done using a,b,c . previous points.
From my experience, I found that if you have a, b, c you can go back to stock easily.
I saw another Russian site where they have custom roms. But you have to be careful. Check if the version they put out is compatible with yours. You mentioned that your tablet version is BTV-W09C128Bxxx. It looks they have custom roms for BTV-W09C233xxx Can you flash this firmware on your tablet? that is tricky and can be risky too. If any one has done it, then it would be nice if they can share their experience.
Link to this Russian site - > http://4pda.ru/forum/index.php?showtopic=780572&st=0#entry54523165
The OTA in the firmware finder is not enough to go back to stock. You can try but I am not hopeful because it is not complete firmware and it might get stuck in between or fail.
For now. you can do factory reset from TWRP. That is the only thing that seems possible. Without stock rom or rollback package, it is very difficult to go back to stock. But if you manage to get stock rom for your device. Then flash it in TWRP. Once it completes you will have stock rom installed on your device.
Hope you find this information useful :good::good::good::good:

Samavb said:
if you check this Russian site
http://hwmt.ru/oth/HWFF/info/view.php
you will find 8 matches for your model.
unfortunately, all are OTA and not full firmware. OTA is good for updating from lower version to higher version. But for downgrading or returning to stock I am not sure. In my experience, I always used the FULL package.
your current situation
1) you have TWRP
2) Rooted ( so bootloader unlocked)
your options
1) Returning to stock seems to be difficult. Only possible way is Hisuite but it won't recognize your device as your tablet is rooted and bootloader unlocked.
To return to stock
a) you need stock recovery ( you will get this once you flash Stock rom in twrp or through erecovery - download stock rom)
b) bootloader locked (this is possible by adb commands using SRK tools )
c) Stock rom (this is the problem - I couldn't find a single site which is hosting FULL stock rom )
d) rollback package ( If there is one, Huawei had it for Huawei mate 8 but for mediapad m3, does it have? I don't know) - I hope this is not mandatory. We should be able to get the job done using a,b,c . previous points.
From my experience, I found that if you have a, b, c you can go back to stock easily.
I saw another Russian site where they have custom roms. But you have to be careful. Check if the version they put out is compatible with yours. You mentioned that your tablet version is BTV-W09C128Bxxx. It looks they have custom roms for BTV-W09C233xxx Can you flash this firmware on your tablet? that is tricky and can be risky too. If any one has done it, then it would be nice if they can share their experience.
Link to this Russian site - > http://4pda.ru/forum/index.php?showtopic=780572&st=0#entry54523165
The OTA in the firmware finder is not enough to go back to stock. You can try but I am not hopeful because it is not complete firmware and it might get stuck in between or fail.
For now. you can do factory reset from TWRP. That is the only thing that seems possible. Without stock rom or rollback package, it is very difficult to go back to stock. But if you manage to get stock rom for your device. Then flash it in TWRP. Once it completes you will have stock rom installed on your device.
Hope you find this information useful :good::good::good::good:
Click to expand...
Click to collapse
Thanks for the reply and the useful information. It seems as though I'm out of luck unless I can find a FULL stock firmware package. However, you did mention that I can use Hisuite? Even though I am unlocked, TWRPed, and rooted, Hisuite still does recognize my device (I think it's because I'm on stock rom). When I click on System Recovery it just says "Your device system is running properly and does not need to be recovered." Is there another method I can go through using Hisuite to restore stock recovery?

Hope - Stock Rom - BTV- W09C128XXX
asianpianoman said:
Thanks for the reply and the useful information. It seems as though I'm out of luck unless I can find a FULL stock firmware package. However, you did mention that I can use Hisuite? Even though I am unlocked, TWRPed, and rooted, Hisuite still does recognize my device (I think it's because I'm on stock rom). When I click on System Recovery it just says "Your device system is running properly and does not need to be recovered." Is there another method I can go through using Hisuite to restore stock recovery?
Click to expand...
Click to collapse
That's great news.
Good that your tablet was recognized by Hisuite.
For system recovery to work. You have to press volume down and then connect the tablet.
Did you do it this way? I think you did.
Do you have "update" or "restore" option in Hisuite?
If yes when you click on "update" did you get "switch to earlier version" If it gives that then yes you can try but even then we have to keep fingers crossed until it completes the process successfully.
One more thing you can try is using HiCare. But this is for updating to nougat or for OS early adopters.
All the options are coming down to stock rom. If you have one stock rom. Then you can flash it in TWRP or extract the update.app and dload it using 3 finger rule.
Full stock rom - that is the key here. Is it possible for you to get the stock rom for your device? So far I found only OTA's from those Russian sites or custom roms for different models. It will be great if can find all stock firmware's for all the models. It will help many people. Since my tablet was working very well, I didn't think about rooting at all. Mine is BTV-DL09C100B006.
One last option is Unroot your tablet using Supersu app. And then flash boot.img (it is recovery.img not boot.img) from one of the OTA firmwares. that way you can get back to stock firmware. But this is tricky. You have to be very careful about this. If anything goes wrong here then you won't be able to boot into tablet. That is why I cannot recommend this option.
Sorry I made a mistake in this post. It is recovery.img not boot.img. Please be aware.
You can try - Factory reset - from inside the OS or from TWRP. :good::good::good::good:

Samavb said:
That's great news.
Good that your tablet was recognized by Hisuite.
For system recovery to work. You have to press volume down and then connect the tablet.
Did you do it this way? I think you did.
Do you have "update" or "restore" option in Hisuite?
If yes when you click on "update" did you get "switch to earlier version" If it gives that then yes you can try but even then we have to keep fingers crossed until it completes the process successfully.
One more thing you can try is using HiCare. But this is for updating to nougat or for OS early adopters.
All the options are coming down to stock rom. If you have one stock rom. Then you can flash it in TWRP or extract the update.app and dload it using 3 finger rule.
Full stock rom - that is the key here. Is it possible for you to get the stock rom for your device? So far I found only OTA's from those Russian sites or custom roms for different models. It will be great if can find all stock firmware's for all the models. It will help many people. Since my tablet was working very well, I didn't think about rooting at all. Mine is BTV-DL09C100B006.
One last option is Unroot your tablet using Supersu app. And then flash boot.img from one of the OTA firmwares. that way you can get back to stock firmware. But this is tricky. You have to be very careful about this. If anything goes wrong here then you won't be able to boot into tablet. That is why I cannot recommend this option.
You can try - Factory reset - from inside the OS or from TWRP. :good::good::good::good:
Click to expand...
Click to collapse
1) When you say pressing volume down and connecting the tablet, I'm not quite sure what you mean. Do you mean from power off? Anyways, from a power on state, I tried using the Update process within Hisuite and it downloads the B003 firmware, then boots into recovery (TWRP), attempts to flash it, fails, and then I manually have to hit restart system within TWRP.
2) I downloaded an OTA update.zip and could not find a boot.img.
3) Also, what does factory reset from inside the OS or from TWRP do exactly?
Thanks again!

Answers
asianpianoman said:
1) When you say pressing volume down and connecting the tablet, I'm not quite sure what you mean. Do you mean from power off? Anyways, from a power on state, I tried using the Update process within Hisuite and it downloads the B003 firmware, then boots into recovery (TWRP), attempts to flash it, fails, and then I manually have to hit restart system within TWRP.
2) I downloaded an OTA update.zip and could not find a boot.img.
3) Also, what does factory reset from inside the OS or from TWRP do exactly?
Thanks again!
Click to expand...
Click to collapse
I am sorry. I should have explained it better.
Pressing volume down and holding it for few seconds and then connecting to computer will take you to bootloader mode.
Then you can do the system recovery.
Yes, if you have stock recovery it will go smoothly. You have BTV-W09C128B002. So you need boot.img of the stock firmware belonging to this OS. then you have to flash that using the below adb command
fastboot flash recovery recovery.img
this should get back the stock recovery. Once you have this. You can try the Hisuite again, this time hopefully it should complete the process.
- you have the update.zip - > extract the update.app -> use Huawei update extractor (software in the attachment) -> extract this zip - > run Huawei UpdateExtractor - now open the update.app - > you will be able to see the recovery.img extract it. Flash it using the adb command in SRK tools.
you can download SRK tool from here -> https://forum.xda-developers.com/showpost.php?p=66627615&postcount=2
Open this tool - > type 000 where it is giving you an option to type 1, 2, or 3 etc.. you will get command prompt . there you have to type the fastboot command to flash the boot.img.
But once again. Just want you to know this process is risky. Wrong file or if anything goes wrong you won't be able to boot into your device. So please be careful. It is risky. Please do not proceed with these steps. Flashing the stock rom is the right way. Or Hisuite. Those are safe methods. But not this.
Factory reset from inside the OS means - > go to settings - > advanced systems -> backup & reset -> factory data reset
that will do the factory reset on your device.
or
since you have TWRP. you can boot into TWRP - go to wipe - > there you will have factory reset. you can do it that way too.
I apologize for not explaining properly. I am sorry I made a mistake. It is recovery.img not boot.img.
Hope you found this information useful. :good::good::good::good::good:

Hi Sam!
unfortunately the custom rom I put 2 days ago hiddens the build numer (it says "B030 greatslon mod") but I annotated the previous one, which was the one you said "BTV-DL09C100B006".
Now I'm at work but this evening I'll try to do what you adviced. Thanks again and have a good day
Daniela

Samavb said:
I am sorry. I should have explained it better.
Pressing volume down and holding it for few seconds and then connecting to computer will take you to bootloader mode.
Then you can do the system recovery.
Yes, if you have stock recovery it will go smoothly. You have BTV-W09C128B002. So you need boot.img of the stock firmware belonging to this OS. then you have to flash that using the below adb command
fastboot flash recovery recovery.img
this should get back the stock recovery. Once you have this. You can try the Hisuite again, this time hopefully it should complete the process.
- you have the update.zip - > extract the update.app -> use Huawei update extractor (software in the attachment) -> extract this zip - > run Huawei UpdateExtractor - now open the update.app - > you will be able to see the recovery.img extract it. Flash it using the adb command in SRK tools.
you can download SRK tool from here -> https://forum.xda-developers.com/showpost.php?p=66627615&postcount=2
Open this tool - > type 000 where it is giving you an option to type 1, 2, or 3 etc.. you will get command prompt . there you have to type the fastboot command to flash the boot.img.
But once again. Just want you to know this process is risky. Wrong file or if anything goes wrong you won't be able to boot into your device. So please be careful. It is risky. Please do not proceed with these steps. Flashing the stock rom is the right way. Or Hisuite. Those are safe methods. But not this.
Factory reset from inside the OS means - > go to settings - > advanced systems -> backup & reset -> factory data reset
that will do the factory reset on your device.
or
since you have TWRP. you can boot into TWRP - go to wipe - > there you will have factory reset. you can do it that way too.
I apologize for not explaining properly. I am sorry I made a mistake. It is recovery.img not boot.img.
Hope you found this information useful. :good::good::good::good::good:
Click to expand...
Click to collapse
Yes, I continue to find your information very useful!
I have downloaded the Huawei Extractor and was able to use it to extract boot.img, fastboot.img, and recovery.img. However, this is for B003 and I am currently on B002. B002 does not appear to be available through the links you previously provided (neither OTA nor Full). Using B003 extracted files, what would be the proper sequence of flashing? Should I install the B003 boot.img first, hope that it boots into fastboot, and then flash B003 recovery.img in fastboot mode? How do I even go about installing B003 boot.img? Through SRK tools or adb? Or is this all too risky, and I should not even bother with B003 OTA files while I am still on B002?
Thanks again!

Hi Sam!!
I recovered my huawei unlock code and tried to relock the tablet, after having resetted it to factory (remember I still have custom rom).
After putting the tablet in bootloader mode and typing the following command on sk tools:
fastboot oem relock xxxxxxxxxxxxxxxxx (my unlock code)
I get:
....
FAILED (remote: stat not match)
finished. total time: 0.00 secs
I also tried "fastboot oem lock xxxxx" but it says "command not allowed".
Do you have ideas? I am blocked there...
Thanks!!
Daniela
Samavb said:
Hi,
You can achieve this by following methods.
Method 1
Since you have TWRP
you can flash the stock firmware from TWRP and it should lock the bootloader, unroot and then overwrite the twrp with stock recovery.
What you need?
For this method you need the stock firmware zip files and firmware finder app from google store.
Method 2 (risky, not recommended)
Download SRK tools by somboons
From here https://forum.xda-developers.com/showpost.php?p=66627615&postcount=2
Unzip the file
Open the application
Then on the main screen, you will have plenty of options to type 1, 2, 3, etc..
Just type 000 to enter the command prompt here.
Once you are in that command prompt you can type the adb commands.
to lock the bootloader you need to type
fastboot oem relock xxxxxxx (just check this command. I think
xxxxx is your bootloader unlock code (yes you have to use the unlock code here again)
this will relock the bootloader.
now to unroot
you can just flash stock firmware using dload method.
How?
download the stock firmware
extract the update.app
put this update.app in a dload folder in sdcard.
you have to create this folder on sdcard and name it as dload.
then you can use the code from dialer pad
*#*#2846579#*#*
from there select SDcard upgrade.
It will reboot and flash the stock firmware. You no longer have root. It will also overwrite the twrp recovery with stock recovery.
I would recommend the method 1. It is safe, easy and should complete the desired tasks within no time.
Method 2 has lot of steps and there is risk involved so I cannot recommend this procedure as confidently as the first one.
I have the Huawei Mediapad M3 LTE version and also Huawei Mate 8. There are few similar functions in Huawei devices.
So now the question is where you will find the stock firmware?
You can find the stock firmwares using firmware finder app in google store.
From here -> https://play.google.com/store/apps/details?id=com.teammt.gmanrainy.huaweifirmwarefinder&hl=en
Install the app.
Open the app
It will automatically find the right firmware's by detecting your tablet model.
All links might not work
So check the one that is working and download that firmware - preferably full firmware.
You will get the zip files if there are two or just one.
then you can follow the method 1.
Hope this works out for you. Hope you find this information useful. :good::good::good:
Click to expand...
Click to collapse
Samavb said:
ok
so your root doesn't seem to work
you don't know if you have custom recovery
you are using EMUI 4.1
1) do the factor reset from the settings > go to -> Settings -> Advanced settings - > backup & reset - > factory data reset
do this - it should take few minutes
2) then -> developer options - > turn on "oem unlock" and " usb debugging " - on
3) please download the srk tools - I think I gave you the link to that software in my previous posts - > please download - extract keep it ready.
4) open the SRK tools - > type 000 in the place where it asks you to type 1 or 2 or 3 .. - you should get command prompt
5) Now press volume down button and hold .. and then connect your tablet to computer ( you have to enter bootloader mode)
6) now we need to lock the bootloader - so run the adb command ( for this you need to put the tablet in bootloader mode )
fastboot oem relock xxxxxxx or fastboot oem lock xxxxxxx
yes you will need the unlock code and in the above command replace the xxxxxx with your unlock code.
lock your bootloader.
7) it will do factory reset - and then your bootloader is locked.
Now at this point you have bootloader locked and you have normal firmware but since you want to go back to stock rom
I am still not clear about the build number. Can you give me the build number ? its in settings - > about tablet - > mine is BTV-DL09C100B006
Model number you and I have the same version. BTV-DL09. But it is the build number which matters.
I checked the firmware finder - unfortunately it is not giving the full firmware - only ota updates.
so the factory reset in the first step above is very very crucial.
The other safe way to get the firmware is through Hisuite
for this you need Hisuite software - you can either go forward to B009 or if it is giving you that option to switch to earlier version then you can go back. But I highly doubt it will give anything. So just try to go forward with B009 ROM.
try all these steps... see if you can succeed to any extent. In the mean time I will try to search for full firmware and if I do I will update this reply or give a new reply.
My name is Sam Hope this works out for you. Don't worry if this doesn't work then we will think about alternatives. But these are very important steps. Good luck. :good::good::good::good::good:
Cheers!
Sam
Update: After going through some of the threads on xda I came across one russian website
http://4pda.ru/forum/index.php?showtopic=780572&st=0#entry54523165
you can check the firmwares. They are all custom firmwares. But I am not sure if the version is compatible. check if your tablet buildnumber is BTV-DL09C100B006 or BTV-DL09C233XXX . that is something you need to be careful.
update2 :- http://hwmt.ru/oth/HWFF/info/view.php
this link contains all stock firmwares - but they are all OTA and not Full package.
Click to expand...
Click to collapse

Path forward - Huawei Mediapad M3
asianpianoman said:
Yes, I continue to find your information very useful!
I have downloaded the Huawei Extractor and was able to use it to extract boot.img, fastboot.img, and recovery.img. However, this is for B003 and I am currently on B002. B002 does not appear to be available through the links you previously provided (neither OTA nor Full). Using B003 extracted files, what would be the proper sequence of flashing? Should I install the B003 boot.img first, hope that it boots into fastboot, and then flash B003 recovery.img in fastboot mode? How do I even go about installing B003 boot.img? Through SRK tools or adb? Or is this all too risky, and I should not even bother with B003 OTA files while I am still on B002?
Thanks again!
Click to expand...
Click to collapse
Yes it is very risky. Please proceed with caution or don't do it at all as these steps are risky and can turn your tablet into brick. I say this because we are not getting the right set of files to test properly. We don't have the rollback package or stock ROM so the situation is precarious. If anything goes wrong, it would only increase your problems. For going back to Stock all you need is Stock Recovery & Stock ROM and unroot.
You are in stock rom but rooted. You just need to flash the right recovery.img file using SRK tools. Please check my previous posts on how to run adb commands using SRK tools. You have to do this in bootloader mode. Fastboot or bootloader mode are one the same. You need only recovery.img and that should be flashed in fastboot or bootloader mode. Check the Russian site http://hwmt.ru/oth/HWFF/info/view.php this has B003 firmware
For the moment it appears like there is only one way forward if nothing else work for you. I hope you have seen the Greatslon ROM files in the other threads. You can download his EMUI 5.0 it looks gr8 and seems to be stable from what I read. He has uploaded all the required files for his ROM. Have a look and see if it interests you.
danibyte27 said:
Hi Sam!
unfortunately the custom rom I put 2 days ago hiddens the build numer (it says "B030 greatslon mod") but I annotated the previous one, which was the one you said "BTV-DL09C100B006".
Now I'm at work but this evening I'll try to do what you adviced. Thanks again and have a good day
Daniela
Click to expand...
Click to collapse
You and I have same tablet version. I bought my tablet on Amazon.de. Please make a note of your steps and how your tablet responded. Based on that we can see how to move forward. It will be really helpful to know your experience.
To both of you @danibyte27 and @asianpianoman
Please be careful while handling these .img files or any system files. Flashing wrong files or any mistakes or errors during flashing can be detrimental for your tablets. There is huge amount of risk. So please proceed with extreme caution. Do not proceed if you have doubts. Please do not hesitate to ask if you are in doubt.
It appears that Greatslon - Android Nougat ROM seems to be the best way forward. As you have seen FULL Rom is not available anywhere. So that complicates things. Going back to stock ROM seems to be very tricky for now until we get the right Stock ROM and other important files.
Please check all my posts. If you like my posts and find it useful. Please don't forget to press :good::good::good::good::good::good::good: for all my posts This will help me a lot and it is a kind of encouragement for my efforts. I appreciate your feedback.:good::good:
---------- Post added at 12:31 AM ---------- Previous post was at 12:26 AM ----------
danibyte27 said:
Hi Sam!!
I recovered my huawei unlock code and tried to relock the tablet, after having resetted it to factory (remember I still have custom rom).
After putting the tablet in bootloader mode and typing the following command on sk tools:
fastboot oem relock xxxxxxxxxxxxxxxxx (my unlock code)
I get:
....
FAILED (remote: stat not match)
finished. total time: 0.00 secs
I also tried "fastboot oem lock xxxxx" but it says "command not allowed".
Do you have ideas? I am blocked there...
Thanks!!
Daniela
Click to expand...
Click to collapse
Did you put the oem unlocking - ON & usb debugging on ?
1) check the bootloader - take a photo and see if it is showing phone locked or unlocked
hold volume down on your tablet for 3 seconds and then connect to computer
update : Can you check if your unlock code is correct?. it says "stat not matched" please check the unlock code.
risky steps
[[[try fastboot oem unlock xxxxxxx even if it says your phone is unlocked. ]]]
[[[then fastboot oem relock xxxxxxxx]]]
if this doesn't work
then flash the recovery of your current firmware using
use SRK tools - go to command prompt - type the below command ( this recovery.img should be in SRK folder )
fastboot flash recovery recovery.img
I would suggest you not to go back to stock. Please try to move forward to greatslon EMUI 5.0 ROM.
https://forum.xda-developers.com/mediapad-m3/development/twrp-greatslon-mod-t3489232
Please check this link https://androidfilehost.com/?w=files&flid=125388 he has uploaded all the files.

Hi Sam,
I think I'll follow your advice and don't try to install stock image until I find a clean and reliable solution
Could you please link me the address to download Greatslon nougat rom? I can only find 6.0 greatslon rom here:
https://www.androidfilehost.com/?w=files&flid=125388
Thanks!!
Dany

Not found
danibyte27 said:
Hi Sam,
I think I'll follow your advice and don't try to install stock image until I find a clean and reliable solution
Could you please link me the address to download Greatslon nougat rom? I can only find 6.0 greatslon rom here:
https://www.androidfilehost.com/?w=files&flid=125388
Thanks!!
Dany
Click to expand...
Click to collapse
It appears he didn't upload the EMUI 5 ROM for BTV-DL09C100 in that link.
However, he uploaded EMUI 5.0 on this Russian forum
http://4pda.ru/forum/index.php?showtopic=780572
But those seem to be for C233 and other versions.
So I think it is better to check with him on the other thread https://forum.xda-developers.com/mediapad-m3/development/twrp-greatslon-mod-t3489232 and see if it is ok to install C233 on C100. It is his work so I feel he is in best position to answer this question . :good::good::good::good::good:

Good news!!! Stock ROM link
danibyte27 said:
Hi Sam,
I think I'll follow your advice and don't try to install stock image until I find a clean and reliable solution
Could you please link me the address to download Greatslon nougat rom? I can only find 6.0 greatslon rom here:
https://www.androidfilehost.com/?w=files&flid=125388
Thanks!!
Dany
Click to expand...
Click to collapse
Hi,
Hope you remember me.
Finally I have some good news for you.
Some wonderful person found the link to download the Stock ROM & Rollback package in another thread.
here is the link
http://consumer.huawei.com/it/support/search/index.htm?keywords=btv-dl09&t=SupportSearch
Go to this link and download the Rollback package and then do the dload method. You will come back to Stock ROM and your bootloader will be locked again. Download both files. Site is in Italian, you can translate it to English. This is the file I was talking about in my previous posts. It was uploaded by Huawei only on March 30th.
This is straight from Huawei so no risk at all and very safe.
They also have the B009 firmware so you can use dload method again and update it to that firmware. After that you can do whatever you want
I hope this is useful for you.
Cheers!
Sam :good::good:

info
drooblz said:
Thank you for this! Been fighting trying to restore my tablet to default settings and apply the latest update. Sitting at B006 right now.
Click to expand...
Click to collapse
I am glad you found it useful. Please have a look at all my posts in other threads as well. I have explained the steps in detail.
There is Android nougat available too. B006 -> B009 -> B010 - > B301 - > this is the path you need to take to get to nougat if your tablet model is C100BXXX. And all these firmwares starting from B010 are available on firmware finder app.
https://play.google.com/store/apps/details?id=com.teammt.gmanrainy.huaweifirmwarefinder

Bootloop + can't reflash

Hello, i'd like some help to unbrick my phone
I tried to root it through TWRP but it couldn't mount some directories so I tried that filesystem modification trick so I just wiped everything (including System) by mistake.
I've been trying since 5+ hours already to reinstall the original ROM/firmware without any success.
I tried to :
- Hold the 3 buttons with the update.app into the dload folder (wont work and will just stop at 5% and tell me it failed) with 2 differents update versions
- Flash system, boot & recovery manually through fastboot and retry to use the update.app, still stopping at 5%
- Tried to use the eRecovery through wifi, tells me it failed to get package infos
I couldn't find anything on the official website, not even the firmware.
Here is the filesystem of all my directories
System - EXT4
Data - F2FS
Cache - EXT4
And my external sd card is small and can only handle the update.app with about 100MO.
The 2 versions I used on the dload were B520 and B100.
I'm CAN-L01 btw

ophelia8 said:
Hello, i'd like some help to unbrick my phone
I tried to root it through TWRP but it couldn't mount some directories so I tried that filesystem modification trick so I just wiped everything (including System) by mistake.
I've been trying since 5+ hours already to reinstall the original ROM/firmware without any success.
I tried to :
- Hold the 3 buttons with the update.app into the dload folder (wont work and will just stop at 5% and tell me it failed) with 2 differents update versions
- Flash system, boot & recovery manually through fastboot and retry to use the update.app, still stopping at 5%
- Tried to use the eRecovery through wifi, tells me it failed to get package infos
I couldn't find anything on the official website, not even the firmware.
Here is the filesystem of all my directories
System - EXT4
Data - F2FS
Cache - EXT4
And my external sd card is small and can only handle the update.app with about 100MO.
The 2 versions I used on the dload were B520 and B100.
I'm CAN-L01 btw
Click to expand...
Click to collapse
Extract B100 with huawei firmware extractor and flash all images in fastboot mode
done

Did this solution work? I'm exactly in the same situation right now, and am wondering how a different fw will be any Better than flashing an original one for the actual cellphone.
Is the b100 the same spec?
Also looking for my product id, but as it's stuck in bootloader there's no chance of me getting it
Bootloader needs to be locked in order to get passed the protection apparently. I'm in unlocked and root. Apparently.

EmuChicken said:
Did this solution work? I'm exactly in the same situation right now, and am wondering how a different fw will be any Better than flashing an original one for the actual cellphone.
Is the b100 the same spec?
Also looking for my product id, but as it's stuck in bootloader there's no chance of me getting it
Bootloader needs to be locked in order to get passed the protection apparently. I'm in unlocked and root. Apparently.
Click to expand...
Click to collapse
If your frp is locked, then it's very difficult to flash by any method, maybe some paid tools can fix.
Sent from my HUAWEI NXT-L29 using XDA-Developers Legacy app

Paid tools did the job.
Used dcunlocker and it's phoenix application, they got me the official firmware for my phone. Took me an age to download as their servers were slow, but they were kind and helped me through

Help with Huawei P9 Lite Possible brick

Hi
I have the Huawei P9 Lite (from south africa)
Model number: HUAWEI VNS-L31
Build number: VNS-L31C185B381
I received the phone with Android Marshmallow and did OTA upgrade to Nougat.
Yesterday I unlocked bootloader and rooted my phone using twrp-3.1.1-0-venus and SuperSU-v2.82 and all went smoothly. I decided to unroot because of issues with banking app. I did a full unroot, but also tried to relock/lock the bootloader, and that's where things went south.
I tried multiple things including trying to flashing the stock ROM (I hope it's the right one) and by following some tutorials online managed to wipe the OS. After multiple stuff I tried I managed to get the phone to boot, but then I only had voice as input method and had none of the Huawei stock apps.
When booting into recovery mode (TWRP), I tried to flash the update.zip I downloaded, but I get error that it can't mount /data and Error code 7.
What I did now was did a complete wipe in TWRP (including OS), extracted the boot.img and system.img from the update.zip and the cust.img from update_full_VNS-L31_hw_meafnaf.zip. I flashed them in fastboot and installed update_data_full_public.zip from TWRP for the Huawei apps (I still got the error that it can't mount /data but it still installed). My phone boots successfully and has the default keyboard and apps enabled again, I thought everything was fixed. When I reached the screen to select security method, after confirming pin/password a second time, it takes me back to the screen where I should choose a security method, not saving my selection. I skipped this to just reach the phone home screen. I enabled developer option, but when clicking on developer options it closes to home screen immediately, so I can't enable USB debugging.
Can someone please help me get my phone into a fully working state (as it was shipped), preferably with bootloader locked (But it's okay if it isn't as that's where my problems started). It is possible that I had wrong versions of ROMs or recovery or something. There is no data I need to preserve, any method to get my phone to it's default working state is what I need. So any help/ links to correct ROMs would be really helpful
Edit:
Even if there is a way for me to just lock the bootloader so that the warranty is back so that I can maybe send it in for replacement

buzzlightyear1309 said:
Hi
I have the Huawei P9 Lite (from south africa)
Model number: HUAWEI VNS-L31
Build number: VNS-L31C185B381
I received the phone with Android Marshmallow and did OTA upgrade to Nougat.
Yesterday I unlocked bootloader and rooted my phone using twrp-3.1.1-0-venus and SuperSU-v2.82 and all went smoothly. I decided to unroot because of issues with banking app. I did a full unroot, but also tried to relock/lock the bootloader, and that's where things went south.
I tried multiple things including trying to flashing the stock ROM (I hope it's the right one) and by following some tutorials online managed to wipe the OS. After multiple stuff I tried I managed to get the phone to boot, but then I only had voice as input method and had none of the Huawei stock apps.
When booting into recovery mode (TWRP), I tried to flash the update.zip I downloaded, but I get error that it can't mount /data and Error code 7.
What I did now was did a complete wipe in TWRP (including OS), extracted the boot.img and system.img from the update.zip and the cust.img from update_full_VNS-L31_hw_meafnaf.zip. I flashed them in fastboot and installed update_data_full_public.zip from TWRP for the Huawei apps (I still got the error that it can't mount /data but it still installed). My phone boots successfully and has the default keyboard and apps enabled again, I thought everything was fixed. When I reached the screen to select security method, after confirming pin/password a second time, it takes me back to the screen where I should choose a security method, not saving my selection. I skipped this to just reach the phone home screen. I enabled developer option, but when clicking on developer options it closes to home screen immediately, so I can't enable USB debugging.
Can someone please help me get my phone into a fully working state (as it was shipped), preferably with bootloader locked (But it's okay if it isn't as that's where my problems started). It is possible that I had wrong versions of ROMs or recovery or something. There is no data I need to preserve, any method to get my phone to it's default working state is what I need. So any help/ links to correct ROMs would be really helpful
Edit:
Even if there is a way for me to just lock the bootloader so that the warranty is back so that I can maybe send it in for replacement
Click to expand...
Click to collapse
Seems to be bad oem.info...??? Try reinstall it...
Odoslané z HUAWEI VNS-L21 pomocou Tapatalku

mrmajco said:
Seems to be bad oem.info...??? Try reinstall it...
Odoslané z HUAWEI VNS-L21 pomocou Tapatalku
Click to expand...
Click to collapse
Hi, I am quite new to rooting and mostly followed tutorials. Can you maybe instruct me how to do this or give links to a tutorial/download link?

[SHARE] [Recovery][Reno 10x zoom]TWRP recovery 3.3.1 by LR.Team/wzsx150

I am not developer of this recovery, you can contact with the developer via Weibo @wzsx150 or email [email protected] or QQ 314010089
Also, I am not authorized to post thread in development part
RECOVERY information:
Name & Version: OPPO Reno 10x zoom version special edition TWRP Chinese and English modified optimization version
Package name: TWRP-3.3.1-OPPO_RENO_10XZ-CN-wzsx150-fastboot.7z
Compile time: 2019.09.22
Applicable Device: OPPO Reno 10x zoom (PCCM00)
Compile Author: wzsx150
Weibo account: wzsx150
Team name: LR.Team
Email address & Alipay donation account: [email protected]
Function Description(based on google translate):
1. This rec supports data partition automatic decryption, encrypted data can be used normally under rec without formatting.
**Please do not arbitrarily flash into the recue of unknown origin, it is likely that the data partition can not be decrypted, which may cause the data is completely lost.
**The data partition is encrypted with a lock screen password. To enter twrp, you need to enter the lock screen password.
2. This rec supports flashing official full-size ozip package.
3. You must unlock the bootloader to flash this rec. Please unlock the BL.
4. Built-in flash magisk / remove magisk function, through the root system, can not only remove dm check, but also enable the system to obtain root privileges.
5. Built-in remove dm checksum and cancel the forced encryption function. Through certain operations, you can remove the official data forced encryption.
6. Prevent the functions covered by the official rec (any one is OK): root system, sign the boot, remove dm check, cancel forced encryption, etc.
7. After the card is officially packaged, it is recommended to turn off the avb2.0 check. Otherwise, it may cause the boot system to be damaged due to root.
8. If the boot prompt system is damaged due to root, etc., you can use the fastboot line to flash boot.img or flash the vbmeta to turn off the checksum and restore normal.
Android 9 version:
www.dropbox.com/s/mrnetu8dvezpq2g/recovery-TWRP-3.3.1-0922-OPPO_RENO_10XZ-CN-wzsx150.img?dl=0
Android 10 version:
www.dropbox.com/s/urtnfqe9jcwq21w/recovery-TWRP-3.3.1-1029-OPPO_RENO_10XZ-CN-wzsx150.img?dl=0
The known bug: it can't decrypt & flash the Android 10 OTA package automaticlly, you have to manually select the decrypted zip file to flash

And how exactly could we unlock the bootloader?

This is only for Chinese ver

thyuro said:
And how exactly could we unlock the bootloader?
Click to expand...
Click to collapse
bbs(.)coloros(.)com/thread-1498611-1-1.html
If you device is Chinese ver, you can read this official announcement.

Anyone who already unlock the bootloader at chinese model? Which are the exactly steps?

I've already unlock bootloader. Via Oppo in-depth tool. This TWRP works, but Magisk only in Core-only mode and I see no way to install modules (
And now GPay isn't works. I think because unlocked bootloader

r00sick said:
I've already unlock bootloader. Via Oppo in-depth tool. This TWRP works, but Magisk only in Core-only mode and I see no way to install modules (
And now GPay isn't works. I think because unlocked bootloader
Click to expand...
Click to collapse
Disable Phone permission on Gpay and try again.

No luck

And where can we find the download for this TWRP? Any roms going around anytime soon you think?
When I try to enter the deeptest apk, it just closes upon start. I think I've removed some apks/services(bloat) before so maybe that's why it doesn't work, but I dont know which to reinstall and cant find the post where it was listed.

krolkrowa said:
And where can we find the download for this TWRP...
Click to expand...
Click to collapse
Take on first post, there is DB link

r00sick said:
I've already unlock bootloader. Via Oppo in-depth tool. This TWRP works, but Magisk only in Core-only mode and I see no way to install modules (
And now GPay isn't works. I think because unlocked bootloader
Click to expand...
Click to collapse
Problem with root solved. To have full workable root via Magisk you need to add string "ro.build.version.sdk=28" to your build.prop, reboot device than switch off Core-only mode in Magisk Manager. Wish you luck to unlock bootloader!

r00sick said:
Problem with root solved. To have full workable root via Magisk you need to add string "ro.build.version.sdk=28" to your build.prop, reboot device than switch off Core-only mode in Magisk Manager. Wish you luck to unlock bootloader!
Click to expand...
Click to collapse
Thank you for the information , i just bought an PCCM00 , logged in with oppo account,i really have to wait 60 days before using the deep app(15 december ) ?
I will post here if i will successful unlock the bootloader and some screenshots with the deep app.

chan1108 said:
I am not developer of this recovery, you can contact with the developer via Weibo @wzsx150 or email [email protected] or QQ 314010089
Also, I am not authorized to post thread in development part
RECOVERY information:
Name & Version: OPPO Reno 10x zoom version special edition TWRP Chinese and English modified optimization version
Package name: TWRP-3.3.1-OPPO_RENO_10XZ-CN-wzsx150-fastboot.7z
Compile time: 2019.09.22
Applicable Device: OPPO Reno 10x zoom (PCCM00)
Compile Author: wzsx150
Weibo account: wzsx150
Team name: LR.Team
Email address & Alipay donation account: [email protected]
Function Description(based on google translate):
1. This rec supports data partition automatic decryption, encrypted data can be used normally under rec without formatting.
**Please do not arbitrarily flash into the recue of unknown origin, it is likely that the data partition can not be decrypted, which may cause the data is completely lost.
**The data partition is encrypted with a lock screen password. To enter twrp, you need to enter the lock screen password.
2. This rec supports flashing official full-size ozip package.
3. You must unlock the bootloader to flash this rec. Please unlock the BL.
4. Built-in flash magisk / remove magisk function, through the root system, can not only remove dm check, but also enable the system to obtain root privileges.
5. Built-in remove dm checksum and cancel the forced encryption function. Through certain operations, you can remove the official data forced encryption.
6. Prevent the functions covered by the official rec (any one is OK): root system, sign the boot, remove dm check, cancel forced encryption, etc.
7. After the card is officially packaged, it is recommended to turn off the avb2.0 check. Otherwise, it may cause the boot system to be damaged due to root.
8. If the boot prompt system is damaged due to root, etc., you can use the fastboot line to flash boot.img or flash the vbmeta to turn off the checksum and restore normal.
Android 9 version:
www.dropbox.com/s/mrnetu8dvezpq2g/recovery-TWRP-3.3.1-0922-OPPO_RENO_10XZ-CN-wzsx150.img?dl=0
Android 10 version:
www.dropbox.com/s/urtnfqe9jcwq21w/recovery-TWRP-3.3.1-1029-OPPO_RENO_10XZ-CN-wzsx150.img?dl=0
The known bug: it can't decrypt & flash the Android 10 OTA package automaticlly, you have to manually select the decrypted zip file to flash
Click to expand...
Click to collapse
Pleas making for oppo a9 2020

Successfully unlocked bootloader and flashed TWRP, and tried to install International ROM (CPH1919EX) on a Chinese model (PCCM00).
I've already decrypted the ROM (using the decrypt tool available) and changed the updater script to avoid the status 7 error.
The flash was only partly successful with an error saying userdata is not accessiable, and the phone is stuck at bootloader.
I could not use TWRP to restore the Chinese ROM, encrypted or decrypted, it would still return the same userdata error. At last I have to restore the stock recovery to flash the Chinese ROM.
Any help would be appreciated....

Hello, can you share APK again? Can't download, error 410. My reno is coming in few days

squallho1 said:
Successfully unlocked bootloader and flashed TWRP, and tried to install International ROM (CPH1919EX) on a Chinese model (PCCM00).
I've already decrypted the ROM (using the decrypt tool available) and changed the updater script to avoid the status 7 error.
The flash was only partly successful with an error saying userdata is not accessiable, and the phone is stuck at bootloader.
I could not use TWRP to restore the Chinese ROM, encrypted or decrypted, it would still return the same userdata error. At last I have to restore the stock recovery to flash the Chinese ROM.
Any help would be appreciated....
Click to expand...
Click to collapse
Looks like I've found the issue... Oppo / Realme phones had a larger system partition size on international models over Chinese models, thus directly flashing the international rom won't work...
So I need to either resize the system partition or resize the system.img to fit in, which is beyond my knowledge...
Would be grateful if anyone could offer some help.

Doesn't work for me, just get a black screen when trying to boot into TWRP(or it just boots like normal).

squallho1 said:
Looks like I've found the issue... Oppo / Realme phones had a larger system partition size on international models over Chinese models, thus directly flashing the international rom won't work...
So I need to either resize the system partition or resize the system.img to fit in, which is beyond my knowledge...
Would be grateful if anyone could offer some help.
Click to expand...
Click to collapse
Hi, Any updates? Iam also stuck at the same situation
---------- Post added at 12:43 PM ---------- Previous post was at 12:12 PM ----------
squallho1 said:
Successfully unlocked bootloader and flashed TWRP, and tried to install International ROM (CPH1919EX) on a Chinese model (PCCM00).
I've already decrypted the ROM (using the decrypt tool available) and changed the updater script to avoid the status 7 error.
The flash was only partly successful with an error saying userdata is not accessiable, and the phone is stuck at bootloader.
I could not use TWRP to restore the Chinese ROM, encrypted or decrypted, it would still return the same userdata error. At last I have to restore the stock recovery to flash the Chinese ROM.
Any help would be appreciated....
Click to expand...
Click to collapse
At last I have to restore the stock recovery to flash the Chinese ROM. How can it be done? thro TWRP? How to restore to stock recovery? And also if you could help me find the chinese ROM for this device. :fingers-crossed:

ashok293 said:
Hi, Any updates? Iam also stuck at the same situation
---------- Post added at 12:43 PM ---------- Previous post was at 12:12 PM ----------
At last I have to restore the stock recovery to flash the Chinese ROM. How can it be done? thro TWRP? How to restore to stock recovery? And also if you could help me find the chinese ROM for this device. :fingers-crossed:
Click to expand...
Click to collapse
As last I've given up trying to flash to Global, tried decrypted ROM, extracting and rebuilding Global system image to Chinese model partition size, but TWRP is still giving the E1001 error. Flashed ColorOS 7 chinese beta and removing all unwanted stuffs (breeno etc.) via ADB, overall it's much better now.
So far I've seen none successful case converting Oppo/Realme Chinese to Global, so I guess besides the system image size, there are other stuffs that needs to be changed and it's too complicated that doesn't worth the time investment.
There's a restore stock recovery option in TWRP's advanced setting.
You can download full Chinese ROM at their official BBS:
https://bbs.coloros.com/forum.php?mod=phones&code=rom&pid=189

squallho1 said:
As last I've given up trying to flash to Global, tried decrypted ROM, extracting and rebuilding Global system image to Chinese model partition size, but TWRP is still giving the E1001 error. Flashed ColorOS 7 chinese beta and removing all unwanted stuffs (breeno etc.) via ADB, overall it's much better now.
So far I've seen none successful case converting Oppo/Realme Chinese to Global, so I guess besides the system image size, there are other stuffs that needs to be changed and it's too complicated that doesn't worth the time investment.
There's a restore stock recovery option in TWRP's advanced setting.
You can download full Chinese ROM at their official BBS:
https://bbs.coloros.com/forum.php?mod=phones&code=rom&pid=189
Click to expand...
Click to collapse
What about CPH1919?
Will this TWRP work for this model?
Will Chinese PCCM00 firmware work on this model?

(SOLVED) I used TWRP and accidentally wrote over the boot recovery partition

Hello,
In a late-night act of utter stupidity, when over-tired, I re-flashed the boot recovery with TWRP and bricked my M3. It obviously can't now enter boot recovery.
I've used TWRP and successfully re-flashed custom roms on my original Mate, and changed regions. (Not in any way an expert, I know how to follow instructions.)
I was trying to convert my Chinese (I was living there) ROM to UK. It's tricky nowadays.
This was a stupid error when tired. Any way back?
I read somewhere that people with the right hardware can do it, but finding someone. I'm in Leeds, UK.
The pad does (did) what I need, and I'm not in a position to buy a new one. If it's dead, it's dead; and I can move on.
Cheers in advance for any input.
SOLVED
See my last post on this thread.
After using Multi Tool V8 to enquire into the machine I switched off and rebooted.
It came back with a "Wipe cache" and "Reset to factory settings" Huawei screen, so I did both and - It booted!
It had spectacularly failed to do anything but boot-loop since coming out of a very dead battery yesterday.
1) Boot recovery, OTA recovery, and dload recovery from SD were all unavailable after the original overwriting of the bootloader.
2) After being dead for months, all recovery options booted from power button plus vol- Vol+ and Vol+/- - but still bootlooping.
Then, suddenly it booted into wipe cache/factory reset screen.
Android 7, EMUI 5.1.3
I have no idea why.
Now fully working. (Including restarting)

I fell in a similar situation after having flashed a magisk module .. unfortunately my nandroid backup didn't restore my devices, but I was able to enter in twrp recovery.. so,..
if you can boot in twrp recovery, not all hopes are lost..
first of all, you must download a stock firmware for your device (i suggest to download trough huawei firmware finder: https://forum.xda-developers.com/tools/general/huawei-firmware-finder-team-mt-t3469146/amp/)
You must download a fullota version of stock firmware
then, you can flash this firmware (3 zip files) trough hurupdater via twrp recovery: https://forum.xda-developers.com/ho...lash-official-firmware-recovery-t3769279/amp/
in order to not overwrite twrp recovery, put the twrp.img file in the same folder and rename it to recovery.img
you can find more info in this topic (follow the instructions, in particular those on how to use hurupdater): https://forum.xda-developers.com/me...ting-btv-dl09-to-unapproved-firmware-t3817541
in order to find a firmware suitable to your device, try to find info on it: you have a mediapad m3 European? American? asian? just wifi or also 4G-LTE (whit a sim and phone functions)? lite or normal version? 10 inches or 8.4?
everyone of these devices have different codenames and suitable firmwares
I found exact firmware for my devices with the procedure described here:
https://forum.xda-developers.com/showpost.php?p=77241673&postcount=3
.. but, if you flashed a wrong firmware, i really don't know if it might help you..
anyway, i wish the info above could help you.

qllkevuoi said:
I fell in a similar situation after having flashed a magisk module .. unfortunately my nandroid backup didn't restore my devices, but I was able to enter in twrp recovery.. so,..
if you can boot in twrp recovery, not all hopes are lost..
first of all, you must download a stock firmware for your device (i suggest to download trough huawei firmware finder: https://forum.xda-developers.com/tools/general/huawei-firmware-finder-team-mt-t3469146/amp/)
You must download a fullota version of stock firmware
then, you can flash this firmware (3 zip files) trough hurupdater via twrp recovery: https://forum.xda-developers.com/ho...lash-official-firmware-recovery-t3769279/amp/
in order to not overwrite twrp recovery, put the twrp.img file in the same folder and rename it to recovery.img
you can find more info in this topic (follow the instructions, in particular those on how to use hurupdater): https://forum.xda-developers.com/me...ting-btv-dl09-to-unapproved-firmware-t3817541
in order to find a firmware suitable to your device, try to find info on it: you have a mediapad m3 European? American? asian? just wifi or also 4G-LTE (whit a sim and phone functions)? lite or normal version? 10 inches or 8.4?
everyone of these devices have different codenames and suitable firmwares
I found exact firmware for my devices with the procedure described here:
https://forum.xda-developers.com/showpost.php?p=77241673&postcount=3
.. but, if you flashed a wrong firmware, i really don't know if it might help you..
anyway, i wish the info above could help you.
Click to expand...
Click to collapse
Thanks for the reply, and sorry for the delay. New child has somewhat taken over our lives!
I'll take a look at the tablet again when I have time, probably next month.

Update - Bootloader working after battery drain: Now what?
[Edit] Post redundant as it started working - see OP.
NwotNot said:
Thanks for the reply, and sorry for the delay. New child has somewhat taken over our lives!
I'll take a look at the tablet again when I have time, probably next month.
Click to expand...
Click to collapse
Well...
After being without power for so long I turned the tablet on and it booted!
However, it then went into OTA and updated - rebooted - and locked the damned bootloader.
1) It's showing as rooted.
2) Boot loader is locked.
3) Fastboot & rescue mode comes up.
4) Recovery (OTA) still comes up but "Fails" this time.
I don't recall how I unlocked it last time. I don't ever rememebr an unlock code.
Status:
Fastboot reports it exists.
ADB reports "Null" not found. (ADB drivers installed).
Firmware version: CPN-AL00C233B078
Device name: CPN-AL00
Serial Number: Showing
IMEI: Showing
Bootloader state: LOCK
I have an old TWRP backup - don't know how to use it.
Solutions?
a) Any kind devs prepared to work with me and find the boot unlocker code for this 5-year old tablet?
b) Any other solutions now we know what's what?
I'm self employed without income in this pandemic and can't really afford to buy a new tablet. If I have to, it won't be Huawei.
(There's a T3 10.6" at £89, but I'm not biting - I need to sort out a budget tablet with at least the oomph of the M3.)
Any help much appreciated. :good:
David.