Nexus 7 bootloader upgrade - Nexus 7 Q&A, Help & Troubleshooting

Hey, I want to upgrade my N7 bootloader from 3.41.3 to a newer vesion because I want to install M kernel.
How do you upgrade it?

Daniel120201 said:
Hey, I want to upgrade my N7 bootloader from 3.41.3 to a newer vesion because I want to install M kernel.
How do you upgrade it?
Click to expand...
Click to collapse
With very considerable care!
Hi, Daniel120201...
The method I use is via fastboot... I don't know if the various toolkits that are available can flash a bootloader, as I've never used them.
So, using fastboot, the command line syntax is...
Code:
fastboot flash bootloader bootloader-grouper-4.23.img
...for flashing bootloader-grouper-4.23.img on a WiFi only 'grouper' Nexus 7.
The bootloader for the WiFi+3G Nexus 7 ('tilapia') will have a different bootloader name.
** (Edit & addendum: just checked, and as expected, it's called bootloader-tilapia-4.23.img) **
So for a WiFi & 3G Nexus 7, the bootloader flash command would be...
Code:
fastboot flash bootloader bootloader-tilapia-4.23.img
-----------------------------------------
IT'S VITALLY IMPORTANT YOU FLASH THE CORRECT BOOTLOADER FOR YOUR SPECIFIC NEXUS 7. Fastboot flashing an incorrect bootloader to the bootloader partition WILL HARDBRICK the device.
And on that note... and before you do anything... it's important you read the following first...
[WARNING][URGENT] N7 grouper (2012 WiFi) bootloader .img files from Google.
Hope this helps... and good luck.
Rgrds,
Ged.

Ty but I upgraded it before seeing this
You still deserve a thanks

GedBlake said:
With very considerable care!
Hi, Daniel120201...
The method I use is via fastboot... I don't know if the various toolkits that are available can flash a bootloader, as I've never used them.
So, using fastboot, the command line syntax is...
Code:
fastboot flash bootloader bootloader-grouper-4.23.img
...for flashing bootloader-grouper-4.23.img on a WiFi only 'grouper' Nexus 7.
The bootloader for the WiFi+3G Nexus 7 ('tilapia') will have a different bootloader name.
** (Edit & addendum: just checked, and as expected, it's called bootloader-tilapia-4.23.img) **
So for a WiFi & 3G Nexus 7, the bootloader flash command would be...
Code:
fastboot flash bootloader bootloader-tilapia-4.23.img
-----------------------------------------
IT'S VITALLY IMPORTANT YOU FLASH THE CORRECT BOOTLOADER FOR YOUR SPECIFIC NEXUS 7. Fastboot flashing an incorrect bootloader to the bootloader partition WILL HARDBRICK the device.
And on that note... and before you do anything... it's important you read the following first...
[WARNING][URGENT] N7 grouper (2012 WiFi) bootloader .img files from Google.
Hope this helps... and good luck.
Rgrds,
Ged.
Click to expand...
Click to collapse
Hi mate ,
really good information , i been looking for something like that for a while...
Where do i get the bootloader from? factory images? if so i have to unlock them and root them again.....
And besides fastboot can i use tools like NRT to flash them?
So many questions...

MAX 404 said:
Hi mate ,
really good information , i been looking for something like that for a while...
Where do i get the bootloader from? factory images? if so i have to unlock them and root them again.....
And besides fastboot can i use tools like NRT to flash them?
So many questions...
Click to expand...
Click to collapse
You download the factory image, extract it and it should be one of the files. The just fastboot flash bootloader bootloadername.img

kilometers4 said:
You download the factory image, extract it and it should be one of the files. The just fastboot flash bootloader bootloadername.img
Click to expand...
Click to collapse
Thanks.
then i should unlock it and root again? also newer is better i am on 4.21 now

MAX 404 said:
Thanks.
then i should unlock it and root again? also newer is better i am on 4.21 now
Click to expand...
Click to collapse
Is it already unlocked? If it is I'm pretty sure it will stay unlocked. But if it isn't, yes you can unlock and root it. Just keep in mind that unlocking the bootloader will wipe your data

kilometers4 said:
Is it already unlocked? If it is I'm pretty sure it will stay unlocked. But if it isn't, yes you can unlock and root it. Just keep in mind that unlocking the bootloader will wipe your data
Click to expand...
Click to collapse
It is already unlocked , thanks for the support , you are number 1.

Related

Unrooting failed?

So I used the Nexus Root Toolkit to flash stock and unroot it, but after using it, I got stuck at the bootloader screen. So I pushed the start button to reboot, and my nexus 7 is still rooted. Help plz?
Give it a try again? I have use this 5 times, work great for me, u have adb fastboot mode on ur desktop?
Sent from my HTC Sensation XL with Beats Audio X315e using xda premium
Download the stock image and flash in fastboot .
Sent from my Nexus 7 using xda premium
So when i try to fastboot the bootloader .img manually, it says:
sending bootloader ... okay
'writing bootlader'.... failed (remote: (invalid state))
so what do i need to do to fix that?
zeiloz said:
So when i try to fastboot the bootloader .img manually, it says:
sending bootloader ... okay
'writing bootlader'.... failed (remote: (invalid state))
so what do i need to do to fix that?
Click to expand...
Click to collapse
Is your bootloader locked?
Sent from my Nexus 7 using xda premium
it said lock status: unlock
So i would presume its unlocked...
zeiloz said:
it said lock status: unlock
So i would presume its unlocked...
Click to expand...
Click to collapse
OK. I've never seen that error before. And a quick google search doesn't come up with anything either.
You could try restarting the bootloader with
Code:
fastboot reboot-bootloader
and trying again.
The only thing I can think of is you could be trying to flash the wrong bootloader (which i doubt) Just to confirm you are trying to flash bootloader-grouper-3.34.img
Also, to just unroot you don't need to reflash the bootloader. Just boot.img and system.img
El Daddy said:
OK. I've never seen that error before. And a quick google search doesn't come up with anything either.
You could try restarting the bootloader with
Code:
fastboot reboot-bootloader
and trying again.
The only thing I can think of is you could be trying to flash the wrong bootloader (which i doubt) Just to confirm you are trying to flash bootloader-grouper-3.34.img
Also, to just unroot you don't need to reflash the bootloader. Just boot.img and system.img
Click to expand...
Click to collapse
Yes, I am trying to flash bootloader.grouper-3.34.img
And Im flashing bootloader because its I'm told to do in this thread? http://forum.xda-developers.com/showthread.php?t=1781250
I will try what you told me and see if it will work
So i rebooted the bootloader, and it still gives me the same thing. Whats the command to boot.img and system .img?
zeiloz said:
So i rebooted the bootloader, and it still gives me the same thing. Whats the command to boot.img and system .img?
Click to expand...
Click to collapse
Both the boot.img and the system.img are in the image-nakasi-jro03d.zip you must extract them first.
Then run: fastboot devices (to make sure you're connected) if it returns the serial number then proceed.
Code:
fastboot flash system system.img
fastboot flash boot boot.img
fastboot erase cache
fastboot reboot
This should maintain your data and unroot your nexus.
However, I am a bit concerned about the invalid state error. I can't find anything about it at all. I'm worried your nand might be corrupted and proceeding with this might lead to an unrecoverable state. Maybe someone else can weigh in on this... I don't want to scare you but I don't want to be responsible if something goes wrong.
hmm... I hope more people would weigh in on this? Cuz im exchanging the nexus 7 due to flickering screens, and im new to the rooting/unrooting stuff so i dont want to brick this device cuz im a n00b.
hmm... I hope someone else weigh in on this to help, cuz I'm going to exchange this nexus 7 for another 1 because of flickering issues...
Restart, carefully check
My nexus had the ghosting issue and I had to unroot my device to ship back today. Heres how I did it.
1. Download stock ROM from Google.
2. Unzip stock ROM from Google. The unzipped file will have 4 files in it. (Boot loader grouper image, flash all.sh, flash base.sh and the image.zip)
3. Unlock your device by clicking the unlock button on nexus root toolkit
4. When your device wakes turns on set it back up. No need to log into Google.
5. turn a dB back on in development
6. Click flash stock + unroot
7. click other/browse
8. For choice click I did this already.
9. Click OK
10. browse to your unzipped file location with the 4 files in it.
11. click OK
12. Done
Sent from my Desire HD using xda premium
I'm facing a similar problem.
http://forum.xda-developers.com/showthread.php?p=31128926
Did you find a way to flash the Bootloader?
I'm thinking about a hardware issue as well. Are there any Devices, with corrupted NAND's known?
Marcus
Gesendet von meinem Galaxy Nexus mit Tapatalk 2

[Q] How to restore DROID RAZR M back to stock JB 4.1.2 from the kitkat 4.4.2

Can any one help me to restore my XT907 back to stock JB 4.1.2 from the stock kitkat 4.4.2 update?
My current System version is: 183.46.10.XT907.Veryzon.en.US
Android Version: 4.4.2
Baseband Version: SM_BP_101031.042.32.86P
Kernal Version: 3.4.42-g5170b6b
[email protected] #1
Fri May 2 00:30:06 PDT 2014
Build Number: KDA20.62-10.1
Build Date: Fri May 2 00:20:25 PDT 2014
Please help me.. Thanks in advance...
Wouldn't recommend you try it on a locked bootloader.
Those that are unlocked shouldn't have any issues.
Technically, with a locked bootloader, if Fastboot will allow you to downgrade, then it should be possible.
You'd have to boot into Fastboot, then run the command:
fastboot flash system system.img
Where system.img is the 4.1.2 image file extracted from the fxz file. If it won't let you do this, then downgrade isn't possible. It will likely say failed flash and you'll have to flash something to kick the phone out of fastboot like logo.img.
You could also try RSDLite and try to flash the 4.1.2 fxz, but I doubt that will work because bootloader and such are not downgradeable and it will likely fail.
GnatGoSplat said:
Technically, with a locked bootloader, if Fastboot will allow you to downgrade, then it should be possible.
You'd have to boot into Fastboot, then run the command:
fastboot flash system system.img
Where system.img is the 4.1.2 image file extracted from the fxz file. If it won't let you do this, then downgrade isn't possible. It will likely say failed flash and you'll have to flash something to kick the phone out of fastboot like logo.img.
You could also try RSDLite and try to flash the 4.1.2 fxz, but I doubt that will work because bootloader and such are not downgradeable and it will likely fail.
Click to expand...
Click to collapse
Thanks for ur reply..
My bootloader is locked. I want to try downgrade to stock 4.1.2. Can u please send me the link to download stock 4.1.2 img and exact steps to downgrade?
Thnaks so much in advance..
kulsforu said:
Thanks for ur reply..
My bootloader is locked. I want to try downgrade to stock 4.1.2. Can u please send me the link to download stock 4.1.2 img and exact steps to downgrade?
Thnaks so much in advance..
Click to expand...
Click to collapse
You can get them here:
http://sbf.droid-developers.org/phone.php?device=8
You can extract the original system.img from the archive as well as logo.img in case the phone doesn't allow you to flash system.img, you can use logo.img to kick the phone out of Fastboot. You will need to install Motorola ADB drivers on your computer in advance, and also need a fastboot.exe file which I think you can find via Google, but if you have ever rooted your phone in the past, usually that also came with fastboot.
Anyway, get into fastboot mode by turning off the phone, then holding down all 3 buttons. Use vol- to select Fastboot and vol+ to choose it. Phone should boot into fastboot.
Connect to PC and issue command:
fastboot flash system system.img
If it works, the phone should be downgraded. If it says flash failed, then downgrade isn't possible. In that case, if the phone is stuck in fastboot mode and can't be rebooted, issue this command to get out of fastboot.
fastboot flash logo logo.img
That should let it reboot as normal.
I actually doubt it's possible to downgrade, but I haven't tried it myself so I can't say for sure.
GnatGoSplat said:
You can get them here:
http://sbf.droid-developers.org/phone.php?device=8
You can extract the original system.img from the archive as well as logo.img in case the phone doesn't allow you to flash system.img, you can use logo.img to kick the phone out of Fastboot. You will need to install Motorola ADB drivers on your computer in advance, and also need a fastboot.exe file which I think you can find via Google, but if you have ever rooted your phone in the past, usually that also came with fastboot.
Anyway, get into fastboot mode by turning off the phone, then holding down all 3 buttons. Use vol- to select Fastboot and vol+ to choose it. Phone should boot into fastboot.
Connect to PC and issue command:
fastboot flash system system.img
If it works, the phone should be downgraded. If it says flash failed, then downgrade isn't possible. In that case, if the phone is stuck in fastboot mode and can't be rebooted, issue this command to get out of fastboot.
fastboot flash logo logo.img
That should let it reboot as normal.
I actually doubt it's possible to downgrade, but I haven't tried it myself so I can't say for sure.
Click to expand...
Click to collapse
Thank u so much my friend, I need to clear that I m using this phone in India with Reliance CDMA network. If downgrade will succeed then will it in verizon locked condition or it will remain unlocked for global use? Also I need to add that I have never unlocked my bootloader or rooted my phone.
kulsforu said:
Thank u so much my friend, I need to clear that I m using this phone in India with Reliance CDMA network. If downgrade will succeed then will it in verizon locked condition or it will remain unlocked for global use? Also I need to add that I have never unlocked my bootloader or rooted my phone.
Click to expand...
Click to collapse
I think it would stay unlocked since you wouldn't be reflashing the radio.
It is easy enough to re-unlock if that should get reversed, however.
Ah, nevermind. Don't bother to try it. Even if you could succeed, you'd end up with black screen after the logo. The newer bootloaders will not allow Jellybean to boot. There is no way to downgrade. KitKat is a one way road with a locked BL. Sorry!
GnatGoSplat said:
Ah, nevermind. Don't bother to try it. Even if you could succeed, you'd end up with black screen after the logo. The newer bootloaders will not allow Jellybean to boot. There is no way to downgrade. KitKat is a one way road with a locked BL. Sorry!
Click to expand...
Click to collapse
:crying::crying::crying::crying::crying:
Sorry for the bad news. I'm in the same boat now too. Thought I would experiment with ways to preserve root, and long story short, now I'm stuck on an unrooted phone on stock KK with locked BL.
Why do you want to downgrade? If it's to be rooted, sorry, no solution for that. If there is some other issue, maybe there is a solution for that specific issue.
GnatGoSplat said:
Sorry for the bad news. I'm in the same boat now too. Thought I would experiment with ways to preserve root, and long story short, now I'm stuck on an unrooted phone on stock KK with locked BL.
Why do you want to downgrade? If it's to be rooted, sorry, no solution for that. If there is some other issue, maybe there is a solution for that specific issue.
Click to expand...
Click to collapse
The issue is my CDMA data is not working after upgrade to kitkat. I m from India and using Reliance CDMA sim. Before update, everything was working perfect. But now only data(EVDO or 1x) is not working. GSM data(3G & 2G) is working.
Please help if u have any solution for this issue.
GnatGoSplat said:
You can get them here:
http://sbf.droid-developers.org/phone.php?device=8
You can extract the original system.img from the archive as well as logo.img in case the phone doesn't allow you to flash system.img, you can use logo.img to kick the phone out of Fastboot. You will need to install Motorola ADB drivers on your computer in advance, and also need a fastboot.exe file which I think you can find via Google, but if you have ever rooted your phone in the past, usually that also came with fastboot.
Anyway, get into fastboot mode by turning off the phone, then holding down all 3 buttons. Use vol- to select Fastboot and vol+ to choose it. Phone should boot into fastboot.
Connect to PC and issue command:
fastboot flash system system.img
If it works, the phone should be downgraded. If it says flash failed, then downgrade isn't possible. In that case, if the phone is stuck in fastboot mode and can't be rebooted, issue this command to get out of fastboot.
fastboot flash logo logo.img
That should let it reboot as normal.
I actually doubt it's possible to downgrade, but I haven't tried it myself so I can't say for sure.
Click to expand...
Click to collapse
I'm also on official KK with locked bootloader, Can i flash kk modified system.img via this method ?
Prohyper said:
I'm also on official KK with locked bootloader, Can i flash kk modified system.img via this method ?
Click to expand...
Click to collapse
Sorry, with locked BL, you can't flash modified system.img or older system.img. I tried it just to make sure, and the phone wouldn't allow it.
GnatGoSplat said:
Sorry for the bad news. I'm in the same boat now too. Thought I would experiment with ways to preserve root, and long story short, now I'm stuck on an unrooted phone on stock KK with locked BL.
Why do you want to downgrade? If it's to be rooted, sorry, no solution for that. If there is some other issue, maybe there is a solution for that specific issue.
Click to expand...
Click to collapse
The issue is my CDMA data is not working after upgrade to kitkat. I m from India and using Reliance CDMA sim. Before update, everything was working perfect. But now only data(EVDO or 1x) is not working. GSM data(3G & 2G) is working.
Please help if u have any solution for this issue.
kulsforu said:
The issue is my CDMA data is not working after upgrade to kitkat. I m from India and using Reliance CDMA sim. Before update, everything was working perfect. But now only data(EVDO or 1x) is not working. GSM data(3G & 2G) is working.
Please help if u have any solution for this issue.
Click to expand...
Click to collapse
Good news is that major developments happened a month ago. :good:
You can now root AND unlock bootloader on KitKat. I think you can find the info you need in this thread:
http://forum.xda-developers.com/showthread.php?t=2783806
Once you have bootloader unlocked, you can downgrade back to JB. I have tried it and can confirm it works.
Good luck!
GnatGoSplat said:
Good news is that major developments happened a month ago. :good:
You can now root AND unlock bootloader on KitKat. I think you can find the info you need in this thread:
http://forum.xda-developers.com/showthread.php?t=2783806
Once you have bootloader unlocked, you can downgrade back to JB. I have tried it and can confirm it works.
Good luck!
Click to expand...
Click to collapse
Thanks much for update..
I can not getting the method. Actually I m new with these things.
Can you please explain how to use tr.apk?
Thanks in Advance..
kulsforu said:
Thanks much for update..
I can not getting the method. Actually I m new with these things.
Can you please explain how to use tr.apk?
Thanks in Advance..
Click to expand...
Click to collapse
You just run it and let it do its thing. Your phone should be rooted once it has rebooted. You can verify with any rootchecker app.
Then install and run Motopocalypse.apk to unlock your bootloader.
You can the use RSDLite to flash back to JellyBean using the JB fxz file. You will need to edit the xml file in the fxz file, removing the lines with gpt.bin and tz.mbn.
GnatGoSplat said:
You just run it and let it do its thing. Your phone should be rooted once it has rebooted. You can verify with any rootchecker app.
Then install and run Motopocalypse.apk to unlock your bootloader.
You can the use RSDLite to flash back to JellyBean using the JB fxz file. You will need to edit the xml file in the fxz file, removing the lines with gpt.bin and tz.mbn.
Click to expand...
Click to collapse
Thanks.. I m getting you.. But I m not using verizon network. My Razr M is unlocked for both CDMA and GSM carrier. I m using my Razr M in India and both CDMA and GSM are working at present. only DATA in CDMA is not working.
My question is will it be remain unlocked for both CDMA and GSM career in India after flashing back stock JELLY BEAN?
Thanks in Advance..
kulsforu said:
My question is will it be remain unlocked for both CDMA and GSM career in India after flashing back stock JELLY BEAN?
Click to expand...
Click to collapse
I believe so, yes.
GnatGoSplat said:
I believe so, yes.
Click to expand...
Click to collapse
Thanks.
Can you please send link to download JB 4.1.2 fxz file. and step by step instruction to flash the file.?

clarify ota updates & root

Hi all
I searched this, but I question here,
1 - When you unroot , put stock and update an ota, it blocks the bootloader?
2 - and the when unlocked, format all to factory?
3 - In what moment the bootloader is blocked? only when first unlock is done?
Thanks in advance, I have an honor 7 and I Know how it works, but this honor 8 L09?
1. probably
2. u can prevent factory reset if unlocked earlier
3. idk what the question means
LastStandingDroid said:
1. probably
2. u can prevent factory reset if unlocked earlier
3. idk what the question means
Click to expand...
Click to collapse
3 - well, the main question is if in every ota update , it locks the boootloader and when unlock, format all ...this is the main question
in honor 7, I unroot, apply the ota and root again with no problems
sorry for my english
deadko said:
3 - well, the main question is if in every ota update , it locks the boootloader and when unlock, format all ...this is the main question
in honor 7, I unroot, apply the ota and root again with no problems
sorry for my english
Click to expand...
Click to collapse
lock bootloader i can't tell, if it does u can unlock the bootloader and again, and straight after flash TWRP it won't wipe the internal SD
Hi. bought an al-10 from china which apparently is flashed. There are a few things not working on phone so apart from trying to get help from seller, i have attempted the flashing myself. i have gone thru a few threads and watched TK vid on flashing twrp and rooting and roni on unlocking bootloader. now, considering the device is flashed i understand the bootloader is still unlocked (in fastboot says phone unlocked). in dev options there is no OEM unlocking option. i cannot get lock state through the code in dialler. when i try to flash twrp, sending recovery OKAY, writing recovery FAILED <remote: command not allowed> so cannot really get to rooting stage
Thank you for the time.
ptwarecki said:
Hi. bought an al-10 from china which apparently is flashed. There are a few things not working on phone so apart from trying to get help from seller, i have attempted the flashing myself. i have gone thru a few threads and watched TK vid on flashing twrp and rooting and roni on unlocking bootloader. now, considering the device is flashed i understand the bootloader is still unlocked (in fastboot says phone unlocked). in dev options there is no OEM unlocking option. i cannot get lock state through the code in dialler. when i try to flash twrp, sending recovery OKAY, writing recovery FAILED <remote: command not allowed> so cannot really get to rooting stage
Thank you for the time.
Click to expand...
Click to collapse
And the device is? Did u use fastboot flash recovery recovery.img
Sent from my FRD-L09 using Tapatalk
LastStandingDroid said:
And the device is? Did u use fastboot flash recovery recovery.img
Sent from my FRD-L09 using Tapatalk
Click to expand...
Click to collapse
Hi.
Sorry device is honor 8 frd-al10.
It was fastboot flash recovery twrp_cn.img
I have just received a message from seller stating it was flashed with eu firmware. I have it as frd c900b120. Should i be using the image for FRD-L09 or FRD-L19 in this case ?
Thank you.

Is it possible to relock the bootloader?

I'm holding off twrp + bootloader unlock because I want to be able to undo in case I need to use my warranty. Is twrp/bootloader unlock reversible? Many thanks
Yes. Flash complete stock everything, boot into bootloader, connect to PC, and "fastboot oem lock".
Is it sure that it works??I have a A2017G and i have open BL and a B29 Custom Rom and i want back to Lock Bootloader
Kevinkuensken said:
Is it sure that it works??I have a A2017G and i have open BL and a B29 Custom Rom and i want back to Lock Bootloader
Click to expand...
Click to collapse
Yup! I've done it plenty of times. You do need to format the data partition though. This could mean that it'll wipe out even your internal storage, so back that up as well!
Im on stock and then i go to edl and then i type fastboot oem lock but nothing happend
Kevinkuensken said:
Im on stock and then i go to edl and then i type fastboot oem lock but nothing happend
Click to expand...
Click to collapse
Boot into bootloader, not EDL.
Erahgon said:
Yup! I've done it plenty of times. You do need to format the data partition though. This could mean that it'll wipe out even your internal storage, so back that up as well!
Click to expand...
Click to collapse
and you can unlock it again afterwards?
Never heard of anyone wanting to lock the bootloader so I'd a newb in this kind of thing.
BlazingBullets said:
and you can unlock it again afterwards?
Never heard of anyone wanting to lock the bootloader so I'd a newb in this kind of thing.
Click to expand...
Click to collapse
Locking it again is good for when you want to sell the device or send it in for warranty repair.
BlazingBullets said:
and you can unlock it again afterwards?
Never heard of anyone wanting to lock the bootloader so I'd a newb in this kind of thing.
Click to expand...
Click to collapse
Yeah, the unlock procedure is the same as before. If you didn't restore the original boot image before the relock, then it's just a matter of booting into fastboot and unlocking the device. Note that this will cause your data to be wiped as well!
If you restore your boot.bin backup file from when your device was locked, does this lock the bootloader? "fastboot oem lock", "fastboot flashing lock" nor "fastboot oem device-info" does nothing for me. Is there any other way to check if your bootloader has been relocked?
Thanks
H0lmEd said:
I'm holding off twrp + bootloader unlock because I want to be able to undo in case I need to use my warranty. Is twrp/bootloader unlock reversible? Many thanks
Click to expand...
Click to collapse
Hi there,
Were you ever able to re-lock your bootloader on your A2017G?
I just want root for now but understand that I'll need to unlock the bootloader first. Before doing that, I want to make sure I can re-lock the bootloader if needed.
Thanks for letting us know!
joaste said:
Hi there,
Were you ever able to re-lock your bootloader on your A2017G?
I just want root for now but understand that I'll need to unlock the bootloader first. Before doing that, I want to make sure I can re-lock the bootloader if needed.
Thanks for letting us know!
Click to expand...
Click to collapse
Guys/Gals, it is seriously as simple as using the fastboot command in reverse. I've done it a few times already with mine.
If you used the following to unlock....
fastboot devices
fastboot oem unlock
.....then you can use the following commands to relock
fastboot devices
fastboot oem lock
fastboot devices is not necessary, but I do it to make sure the devices is being recognized by ADB/FASTBOOT
sauerkraut17 said:
Guys/Gals, it is seriously as simple as using the fastboot command in reverse. I've done it a few times already with mine.
If you used the following to unlock....
fastboot devices
fastboot oem unlock
.....then you can use the following commands to relock
fastboot devices
fastboot oem lock
fastboot devices is not necessary, but I do it to make sure the devices is being recognized by ADB/FASTBOOT
Click to expand...
Click to collapse
Thanks for the answer.
But there are a few files to flash before using that command according to this thread.
Doesn't anything need to be flashed again (e. g. stock files or anything)?
Correct, but you would have already flashed those in order to use the unlock command in the first place.
Are you trying to relock on marshmallow or nougat?
sauerkraut17 said:
Correct, but you would have already flashed those in order to use the unlock command in the first place.
Are you trying to relock on marshmallow or nougat?
Click to expand...
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My phone is only a few days old. I'm debating whether to keep it or not (considering the Mate 9, but the price is not the same - love the form factor and bigger screen though - sound won't be the same and I think I'll miss the MiPop button on the Axon (never thought that would happen )).
I'm on the latest MM (B10 - the A2017G model).
Following the mentioned thread, I got to the point of installing TWRP (the signed version), only to realize that besides making backups, there is not much else I can do with that without unlocking the bootloader. I really just wanted to flash supersu and install adaway fro the time being until development matured for this phone (maybe also play around with viper - had great results on my LG G4).
HI, I get the error "FAILED (remote: unknown command)" in ADB when I enter "fastboot oem lock". Any way to fix this?
Guys, can anyone help me? I really need to lock the bootloader!
How can I fix the error "FAILED (remote: unknown command)" in ADB when I enter "fastboot oem lock"?
I'm on MM B11 Stock.
https://i.imgur.com/fdkgYs6.jpg
Hi Guys,
The Axon 7 Model A2017U I just purchased has the bootloader locked and it is running LineageOS 14.1 - 2018032-Nightly-axon7. I need to relock the bootloader and get back to the stock MiFavor rom so that I can send the phone to ZTE for repair. Can you please explain to a newb in some detail how to achieve that.
Thank you.

Help me : How to restore factory image

Hi guys. Sorry for being noob.
Wanna asking (confused).
My Nexus 7 (2012 Wifi) used Omni Rom 4.4.4
I wanna restore back to Stock Rom.
Do i need to Unroot & Unlock my nexus first before click " flash-all.bat " ??.
I worry might be soft brick if wrong step.
Many many thanks ^_^v
suaji said:
Hi guys. Sorry for being noob.
Wanna asking (confused).
My Nexus 7 (2012 Wifi) used Omni Rom 4.4.4
I wanna restore back to Stock Rom.
Do i need to Unroot & Unlock my nexus first before click " flash-all.bat " ??.
I worry might be soft brick if wrong step.
Many many thanks ^_^v
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Click to collapse
No, you were previously on OmniROM means your bootloader is already unlocked. You just need to boot into bootloader/fastboot mode and flash stock image. Do make sure you have the correct drivers installed. You could use the Universal Naked Drivers if you don't have the correct drivers installed.
rahimali said:
No, you were previously on OmniROM means your bootloader is already unlocked. You just need to boot into bootloader/fastboot mode and flash stock image. Do make sure you have the correct drivers installed. You could use the Universal Naked Drivers if you don't have the correct drivers installed.
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Noted!.
TQ Sir for replying me ^_^v
i saw inside flash.bat got code :
so that mean i need to do manual oem lock right?.
Code:
fastboot oem unlock
fastboot erase boot
fastboot erase cache
fastboot erase recovery
fastboot erase system
fastboot erase userdata
fastboot flash bootloader bootloader-grouper-4.23.img
fastboot reboot-bootloader
sleep 10
fastboot -w update image-nakasi-lmy47v.zip
suaji said:
Noted!.
TQ Sir for replying me ^_^v
i saw inside flash.bat got code :
so that mean i need to do manual oem lock right?.
Code:
fastboot oem unlock
fastboot erase boot
fastboot erase cache
fastboot erase recovery
fastboot erase system
fastboot erase userdata
fastboot flash bootloader bootloader-grouper-4.23.img
fastboot reboot-bootloader
sleep 10
fastboot -w update image-nakasi-lmy47v.zip
Click to expand...
Click to collapse
If you mean re-lock the bootloader, yes, you will have to do that manually. It's supposed to be a risky procedure so do so at your own risk.
By the way, your signature shows Next 7 3G, that would be the Tilapia rather than Grouper. Make sure before you flash please.
rahimali said:
If you mean re-lock the bootloader, yes, you will have to do that manually. It's supposed to be a risky procedure so do so at your own risk.
By the way, your signature shows Next 7 3G, that would be the Tilapia rather than Grouper. Make sure before you flash please.
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thanks for helping sir.
now I can use stock rom back..

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