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[Solved 100% work] Huawei Mate 7 MT7-TL10 Downgrade to Kitkat 4.4.2 EMU 3.0

Huawei Mate 7 MT7-TL10 Rollback to Kitkat 4.4.2 EMU 3.0
Huawei is well known Chinese manufacturer for his well designed & well performing smartphones.
Mate 7 is one of the most powerful smartphones , but software updates have been always problematic for huawei phones, as you can read on many sites & forums their support is really poor.
After lollipop 5.1.1 upgrade to Mate 7 some users started to experience issues with this model. and find it unstable on mate 7 they wanted to roll back to official kitkat 4.4.2 version of android. but they can't as it was not possible technically.
i also read on some blogs we can't roll back. but while browsing huawei website i came up with the solution. They have official tool to downgrade this phone to your official stock ROM kitkat 4.4.2.
Important:carefully chose between TL10 & TL09 downgrade packs
Procedure
1. You need original stock ROM for your model which you can easily find from official huawei website.
2. Download roll back software from this link http://depositfiles.com/files/mcqxdmk1nn (You can also find it on official huawei site) For MT7-TL09 Single Sim
3. Extract roll back software zip file
4. Brows extracted folder and copy dload folder to your SD card.
5. Insert sd card in mate 7 & go to , Settings->Updater->Menu->Local update
6. Please don't touch phone during update process
7. After update finished phone will turn off. turn it on and check to confirm if current version is MT7-TL10C900B000.
8. Now you are ready to downgrade, Download your kitkat 4.4.2 installation package which match best with your phone from huawei website.
according to huawei installation guide MT7-TL10V100R001B125SP02 is most build version.
9. Repeat to the procedure , copy dload folder from kitkat 4.4.2 firmware file & update same way as you did before by going "Settings->Updater->Menu->Local update"
if everything goes well you will be running kitkat 4.4.2 after this process. i will be happy to assist you if need any help in downgrade process.
Credit for this guide goes to huawei developer who shared this procedure. and ministryofsolutions website and MR Mutahhar Bashir (copied to help)

I currently have KK MT7-TL10V100R001CHNC00B133 will this work for me as well? Seems this version of KK has some bugs in it with themes.

Be careful while trying this. i was on b326 and tried this and failed at 5 or 10 or something, then after reboot it didn't boot. repetitively restarting, rapidly restarting. as soon as u see "huawei powered by android" screen after 2 seconds, it restarts. not ariving to the booting animation. so couldn't boot into recovery, or fastboot. it was hardbricked until after many minutes trying key combinations which no one was effective until one retart it started booting. ithink the effective key combination that made this happen might be Volume DOWN (no power). hold volume down for 5- 10 repetitive restarts (dont remove your finger from volume down).
after restart make sure to allow usb debugging and connect usb to computer and type:
adb devices
if found then type:
adb reboot bootloader
it loaded into bootloader for me. you should have unlocked bootloader. now extract recovery.img from the rom you currently had (for me 326), copy it to platform_tools folder and type:
fastboot flash recovery recovery.img
if okay then:
fastboot reboot
this fixed for me. and never ever try this downgrade pack again. instead upgrade to marshmallow and the downgrade to 4.4 using this thread:
Huawei Mt7-L09/TL10 Stock firmware, Ota update and Twrp Backup all in one place
Hi all. Now i create topic with firmware for Huawei Ascend Mate7. I download and upload to mega cloud for you. First and Last firmware for Europe & otchers...
forum.xda-developers.com
however i believe i one time downgraded from another thread as most links are now obsolete after 6 years at the top thread.

[SOLVED] Need help to upgrade from L31-C900B151 to latest Nougat build

SOLVED: please check my 2nd post.
Hello guys,
I would like to upgrade my P9 Lite L31 from M to N official. I've tried the past few days but it always ends up with "NRD90M test-keys" on build number and missing apps. I have read A LOT of threads/posts about this issue, really everywhere, but I can't figure out how to update my device without problem.
Also I do know there are some Q&A threads/GUIDES/HOW-TOs in the forum but I don't find the right procedure for my case.
I assume it's because I've flashed the wrong package or forgot something in the procedure...
I've followed this GUIDE by @simo255: https://forum.xda-developers.com/huawei-p9lite/how-to/nougat-official-firmware-t3512932
Here is my info:
P9 Lite VNS-L31
3 Gb RAM
Build: VNS-L31C900B151
EMUI 4.1.1
So, I'm on C900B151 and I'd like now to upgrade to C432B380 (or C432B381 ?) (or above if available).
If I understand well, the correct procedure is:
1- unroot (necessary?)
2- change from C900 to C432, by flashing an C432 OEMINFO.img through Meticulus TWRP (v4)
3- flash the latest Nougat update.zip package (B370/B371 or B380/B381) through Meticulus TWRP (v4)
4- flash the latest data full EU zip (B370/B371 or B380/B381)
5- reboot
Is it OK?
At steps 3 and 4, do I have to get UPDATE.app for B3xx and use the dload method instead?
FYI, I didn't follow step 2 when I tried, is it the culprit of my CUST errors in TWRP/"NRD90M test-keys"/missing apps problems? Or is it because I've flashed B370 instead of B371?
A few questions:
1- Is it a problem to currently run B151 firmware for my L31 for the Nougat upgrade process? I've read that the last digit means dual SIM or single SIM. I think I have a single SIM version but I'm not sure... How to know for sure? Sorry for the dumb question
2- If I don't follow the procedure above but if I relock my BL and then check for updates, do you think I will get a Nougat full OTA for C900 (C900B151 > C900B3xx)? Is it really necessary for me to change from C900 to C432?
3- In any cases, would it be possible to upgrade directly from B151 to B38x? Or do I have to go through B16x or B37x?
4- I can't figure out how to get the correct full OTA for Nougat, the one bigger than 1,9 Gb. I always get 1,25 Gb package through OTA update in settings, even when I'm running C432B160...
5- Is it possible to use Firmware Finder to update from B151 directly to B38x (or above)?
I already tried to flash a B370 update.zip and data full EU (from this GUIDE) but I have error about CUST in TWRP and as already said, then I get "NRD90M test-keys" on build number and missing apps after reboot.
After this, I successfully downgraded to C432B160 (maybe it would be better to downgrade to B161?) and I get the B370 OTA (1,25 Gb), but as you know it's not the FULL OTA... So AGAIN: "NRD90M test-keys" on build number and missing apps.
Sorry for the long post but I find really hard to flash/update stuff on this P9 Lite. I'm really confused. I was before on a Samsung S3 LTE and it was easier...
Any advices?
Thanks in advance.

I solved my problem!
My mistake was to install build VNS-L31C432B160 instead of VNS-L31C432B161, that's why OTA available was not the correct one (1,25 Gb instead of 1,99 Gb)
B160, B370, B380 are for dual SIM
B161, B371, B381 are for single SIM
I have a P9 Lite L31 SINGLE SIM
I was on previously on build VNS-L31C900B151 and I'm now running build VNS-L31C432B381 official and everything is working well.
The steps:
1- Download Update.zip of VNS-L31C432B161 (size around 1.6+ GB) (I've found it and downloaded it with Firmware Finder)
2- Extract the UPDATE.APP of the ZIP with 7-zip or similar and copy it on External SDCARD in a dload folder
2- Make sure to be rooted (Bootloader unlocked, TWRP v4 by Meticulus installed and SuperSU flashed)
3- Flash OEMinfo.img and custom.bin for C432 Single SIM (download link: https://forum.xda-developers.com/hu...nt/europe-vns-l31-toolkit-bootloader-t3432873, from this thread: https://drive.google.com/drive/folders/0B3CRCPqinridRXNPdDNuM2g5dTA) with Toolkit (download link: https://forum.xda-developers.com/devdb/project/?id=16538#downloads from this thread: https://forum.xda-developers.com/hu...nt/europe-vns-l31-toolkit-bootloader-t3432873)
4- Reboot > It asks for decryption key (I entered a wrong one because I didn't even know the code) > it fails to decrypt and then ask for factory reset
5- Factory reset fails (I don't know why)
6- Reboot on Android > build is now VNS-L31C432B151 (it changed from C900 to C432 thanks to the OEMinfo.img and custom.bin)
7- Shutdown the phone
8- Start the phone with 3 buttons method: vol- ; vol+ ; power
9- Wait a few minutes L31C432B161 to be installed > It reboots and you're now running L31C432B161
10- Search for OTA in ROM settings > You will get L31C432B371 > Download and apply the update
11- Wait a few minutes L31C432B371 to be installed > It reboots and you're now running L31C432B371
12- Search for OTA in ROM settings > You will get L31C432B381 > Download and apply the update
13- Wait a few minutes L31C432B381 to be installed > It reboots and you're now running L31C432B381
14- Done!

So i have the same problem.
I've the L21 Dual sim model (2GB) and i tried to update.
Messed up with firmware finder and ended up with a wrong update. I've managed to get back to L21C432B160.
What version do I pick with Firmware finder? Or do i need to flash another OEMinfo.img en custom.bin first to get an update?
I don't want to end up with beta firmware or something messed up so I keep getting future updates. I don't understand why the OTA update is still here on my p9.

michaeldepotter said:
So i have the same problem.
I've the L21 Dual sim model (2GB) and i tried to update.
Messed up with firmware finder and ended up with a wrong update. I've managed to get back to L21C432B160.
What version do I pick with Firmware finder? Or do i need to flash another OEMinfo.img en custom.bin first to get an update?
I don't want to end up with beta firmware or something messed up so I keep getting future updates. I don't understand why the OTA update is still here on my p9.
Click to expand...
Click to collapse
Which oeminfo.img and custom.bin did you flash lately? Is it your own files or from someone else?
And you say you are currently running L21C432B160 but which OTA version is showing up now in ROM settings? Which size?
Sent from my P9 lite using XDA Labs

Haven’t flash any of these files yet. I dont have an ota in upater right now. That is The probleem. Only with the firmware Finder i can get updates but i dont know which i should pick

michaeldepotter said:
Haven’t flash any of these files yet. I dont have an ota in upater right now. That is The probleem. Only with the firmware Finder i can get updates but i dont know which i should pick
Click to expand...
Click to collapse
If you want to get OTA updates, you need to have your bootloader locked. Is your bootloader currently unlocked?
Sent from my P9 lite using XDA Labs

Yes. But the problem also occured when it was locked.

Update for Huawei P9 Lite 2016 Dual Sim (VNS-L31C900B114 to VNS-L31C432B160 firmware)
Wood Man said:
I solved my problem!
My mistake was to install build VNS-L31C432B160 instead of VNS-L31C432B161, that's why OTA available was not the correct one (1,25 Gb instead of 1,99 Gb)
B160, B370, B380 are for dual SIM
B161, B371, B381 are for single SIM
I have a P9 Lite L31 SINGLE SIM
I was on previously on build VNS-L31C900B151 and I'm now running build VNS-L31C432B381 official and everything is working well.
The steps:
1- Download Update.zip of VNS-L31C432B161 (size around 1.6+ GB) (I've found it and downloaded it with Firmware Finder)
2- Extract the UPDATE.APP of the ZIP with 7-zip or similar and copy it on External SDCARD in a dload folder
2- Make sure to be rooted (Bootloader unlocked, TWRP v4 by Meticulus installed and SuperSU flashed)
3- Flash OEMinfo.img and custom.bin for C432 Single SIM (download link: https://forum.xda-developers.com/hu...nt/europe-vns-l31-toolkit-bootloader-t3432873, from this thread: https://drive.google.com/drive/folders/0B3CRCPqinridRXNPdDNuM2g5dTA) with Toolkit (download link: https://forum.xda-developers.com/devdb/project/?id=16538#downloads from this thread: https://forum.xda-developers.com/hu...nt/europe-vns-l31-toolkit-bootloader-t3432873)
4- Reboot > It asks for decryption key (I entered a wrong one because I didn't even know the code) > it fails to decrypt and then ask for factory reset
5- Factory reset fails (I don't know why)
6- Reboot on Android > build is now VNS-L31C432B151 (it changed from C900 to C432 thanks to the OEMinfo.img and custom.bin)
7- Shutdown the phone
8- Start the phone with 3 buttons method: vol- ; vol+ ; power
9- Wait a few minutes L31C432B161 to be installed > It reboots and you're now running L31C432B161
10- Search for OTA in ROM settings > You will get L31C432B371 > Download and apply the update
11- Wait a few minutes L31C432B371 to be installed > It reboots and you're now running L31C432B371
12- Search for OTA in ROM settings > You will get L31C432B381 > Download and apply the update
13- Wait a few minutes L31C432B381 to be installed > It reboots and you're now running L31C432B381
14- Done!
Click to expand...
Click to collapse
Greetings ...
What do you mean " Search for OTA in ROM settings > You will get L31C432B371 > Download and apply the update " ?
Regards...

george_1234 said:
Greetings ...
What do you mean " Search for OTA in ROM settings > You will get L31C432B371 > Download and apply the update " ?
Regards...
Click to expand...
Click to collapse
I meant once you run full working Android 6, you have to go in Android settings, in a menu called something like "system updates" or similar and you should see if a newer Android version is available, meaning Android 7.
I'm running Android 7.0, so I can't show you screenshots from Android 6,sorry... Here are 2 screenshots from EMUI 5.0 (Android 7) in case it could help.

P9 lite No audio After TWRP restore Dload failing HELP

[SOLVED] Hi i was on l-31c432b381 firmware with emui 5.0 and android 7.0, i have unlocked the bootloader for install magisk 12.0 and have root permissions, after months i saw an update for my phone (b389) so i tried to upgrade but i had twrp so error 1 or 7, i flashed the stock recovery, redowload the update and the install failed at 5%, so i tried to unistall magisk before update, but nothing it wont update, after few tries the upgrader says that the update now is not 300mb but is full and is 2gigs, so i think is the time.. but no. so i tried to force the update with 3 buttons recovery dload method but it doesn't work at all 5% at every try. so i searched for support and i found that the ota connot be installed on unlocked devices, so i tried to relock my bootloader with oem relock and the unlock number but it says root type is risk... so i can't even relock my bootloader.. other says that i have to install to relock or can relock... but is b381 the stock? or they instend the mm version? i don't remember what version p9 lite ships. i tried to flash imgs through fastboot but even if i flash system and boot of the b389 the system boot and the info are of the b381, unisatlling app system crash, so i restored my previous backup made through twrp recovery, i immidiatly noticed that the huawei boot animations was gone and was an android stock animation. i thinked it was fine and all was working properly, i give up o upgrade and i was fine but sad. after few hours i tried to make a paper copy with my printer that have nfc but my phone keep shows and hide nfc symbol like on off on off on off over and over even after reboot, after a call i understand that the audio doesn't was working, every type of audio not work even the mic. i don't see any other problems but without sounds is unusable as a phone or mulimedia things... sorry for bad english please HELP i tried all i founded ...

Franseven said:
Hi i was on l-31c432b381 firmware with emui 5.0 and android 7.0, i have unlocked the bootloader for install magisk 12.0 and have root permissions, after months i saw an update for my phone (b389) so i tried to upgrade but i had twrp so error 1 or 7, i flashed the stock recovery, redowload the update and the install failed at 5%, so i tried to unistall magisk before update, but nothing it wont update, after few tries the upgrader says that the update now is not 300mb but is full and is 2gigs, so i think is the time.. but no. so i tried to force the update with 3 buttons recovery dload method but it doesn't work at all 5% at every try. so i searched for support and i found that the ota connot be installed on unlocked devices, so i tried to relock my bootloader with oem relock and the unlock number but it says root type is risk... so i can't even relock my bootloader.. other says that i have to install to relock or can relock... but is b381 the stock? or they instend the mm version? i don't remember what version p9 lite ships. i tried to flash imgs through fastboot but even if i flash system and boot of the b389 the system boot and the info are of the b381, unisatlling app system crash, so i restored my previous backup made through twrp recovery, i immidiatly noticed that the huawei boot animations was gone and was an android stock animation. i thinked it was fine and all was working properly, i give up o upgrade and i was fine but sad. after few hours i tried to make a paper copy with my printer that have nfc but my phone keep shows and hide nfc symbol like on off on off on off over and over even after reboot, after a call i understand that the audio doesn't was working, every type of audio not work even the mic. i don't see any other problems but without sounds is unusable as a phone or mulimedia things... sorry for bad english please HELP i tried all i founded ...
Click to expand...
Click to collapse
Hi, my english is bad too , B389 is an OTA update, its impossible upgrade via fstboot or via TWRP (error 7). IMO the right way to fix your problems - downgrade to MM , then back to Nougat etc. (remove pattern Lock , Fingerprint lock, root etc. before installing downgrade). It will erase all your phone data!!!
Download official rollback package for your VNS-L31C432
http://download-c1.huawei.com/download/downloadCenter?downloadId=93789&version=373429&siteCode=sk
and download MM firmware VNS-L31C432B161 (Single SIM)
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1164/g104/v66022/f1/full/update.zip
1) Create a new folder dload in root directory of SD card (root directory : it means dont put it in any folder .) Now unpack the rollback package and copy its contents “UPDATE.APP” to the “dload” folder. Use the 3 button combo installation. After your firmware version should now be on “B300” or "test-keys".
2) Remove from dload folder rollback package, extract the ZIP file with MM firmware to the dload folder and use 3 combo button installation.
Or you can use this method : on your phone launch the phone dialer app and dial *#*#2846579#*#*. Next, select Project Menu – > Software upgrade – > SDcard upgrade – > and confirm the flashing process that is about to be initiated.
Good luck!

bozka1 said:
Hi, my english is bad too , B389 is an OTA update, its impossible upgrade via fstboot or via TWRP (error 7). IMO the right way to fix your problems - downgrade to MM , then back to Nougat etc. (remove pattern Lock , Fingerprint lock, root etc. before installing downgrade). It will erase all your phone data!!!
Download official rollback package for your VNS-L31C432
http://download-c1.huawei.com/download/downloadCenter?downloadId=93789&version=373429&siteCode=sk
and download MM firmware VNS-L31C432B161 (Single SIM)
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1164/g104/v66022/f1/full/update.zip
1) Create a new folder dload in root directory of SD card (root directory : it means dont put it in any folder .) Now unpack the rollback package and copy its contents “UPDATE.APP” to the “dload” folder. Use the 3 button combo installation. After your firmware version should now be on “B300” or "test-keys".
2) Remove from dload folder rollback package, extract the ZIP file with MM firmware to the dload folder and use 3 combo button installation.
Or you can use this method : on your phone launch the phone dialer app and dial *#*#2846579#*#*. Next, select Project Menu – > Software upgrade – > SDcard upgrade – > and confirm the flashing process that is about to be initiated.
Good luck!
Click to expand...
Click to collapse
Ok i'm posting in real time now. i'm copy update.app in dload folder (rollback)
it have completed ... wow
same android boot animation, the version says is nrd90m test keys (still no audio)
now i'm copying full mm firmware
its installing 40% i'm loving you.. 50% 60% 70%80%90% SUCCESS
user reset... OK
huawei boot animation with audio!!!!!!!!!!!!!!! and there is not unlocked text like (......can't be trusted...)
ok wifi connected skip.skip skip.... start
song... AUDIO WORKING
recording, its working, nfc ok
i'm on b161 and it shows update, now, can i update to the latest version?
THANK YOU SO MUCH

Franseven said:
Ok i'm posting in real time now. i'm copy update.app in dload folder (rollback)
it have completed ... wow
same android boot animation, the version says is nrd90m test keys (still no audio)
now i'm copying full mm firmware
its installing 40% i'm loving you.. 50% 60% 70%80%90% SUCCESS
user reset... OK
huawei boot animation with audio!!!!!!!!!!!!!!! and there is not unlocked text like (......can't be trusted...)
ok wifi connected skip.skip skip.... start
song... AUDIO WORKING
recording, its working, nfc ok
i'm on b161 and it shows update, now, can i update to the latest version?
THANK YOU SO MUCH
Click to expand...
Click to collapse
Yes, you can. Via OTA, or you can use TWRP (Meticulus 3.0.2.0 only ! ) and flash both .zip files. You must download two files:
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G753/g104/v80474/f1/full/update.zip
and
http://update.hicloud.com:8180/TDS/...-L11_hw_eu/update_data_full_VNS-L11_hw_eu.zip.
In TWRP set Install, then select memmory SD card, and klick on
update.zip, confirm installation. After, STAY in TWRP, go back to Install, find file ...hw_eu....zip , confirm installation. Then select rebot system. Done!

bozka1 said:
Yes, you can. Via OTA, or you can use TWRP (Meticulus 3.0.2.0 only ! ) and flash both .zip files. You must download two files:
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G753/g104/v80474/f1/full/update.zip
and
http://update.hicloud.com:8180/TDS/...-L11_hw_eu/update_data_full_VNS-L11_hw_eu.zip.
In TWRP set Install, then select memmory SD card, and klick on
update.zip, confirm installation. After, STAY in TWRP, go back to Install, find file ...hw_eu....zip , confirm installation. Then select rebot system. Done!
Click to expand...
Click to collapse
i've done b371 thrugh updater now it doesn't show newer versions but i'm using b389 dload and it should go ok right? (full b389 update.app)

Franseven said:
i've done b371 thrugh updater now it doesn't show newer versions but i'm using b389 dload and it should go ok right? (full b389 update.app)
Click to expand...
Click to collapse
Try it, but I think, you will get a message "not compatible" . Via dload its impossible, IMO use rather Huawei firmware finder or wait for OTA update.

bozka1 said:
Try it, but I think, you will get a message "not compatible" . Via dload its impossible, IMO use rather Huawei firmware finder or wait for OTA update.
Click to expand...
Click to collapse
yes it failed with b389 dload full
i'm on b371, i've to download and flash manually the b381 and after b389? where i can find otas?

Franseven said:
yes it failed with b389 dload full
i'm on b371, i've to download and flash manually the b381 and after b389? where i can find otas?
Click to expand...
Click to collapse
If I said, it's impossible manually update to 381 or 389 using OTA firmware, trust me . Try Firmware finder. GL!

bozka1 said:
If I said, it's impossible manually update to 381 or 389 using OTA firmware, trust me . Try Firmware finder. GL!
Click to expand...
Click to collapse
i tried full ota (firmware finder) flashes from twrp but gives error 7
e:unknown command [errno]
update_huawei_pkg_from_ota_zip: failed

Franseven said:
i tried full ota (firmware finder) flashes from twrp but gives error 7
e:unknown command [errno]
update_huawei_pkg_from_ota_zip: failed
Click to expand...
Click to collapse
https://m.youtube.com/watch?v=s5hHTZ4LGMM

bozka1 said:
https://m.youtube.com/watch?v=s5hHTZ4LGMM
Click to expand...
Click to collapse
it worked with the dns method not the proxy (was keeping redownload infinite patch over 4gigs tot crazy)
i'm now back at b381 with sound but without my data, i'm trying to reach b389 and over, can i restore through twrp only data partition without a hitch?
in b389 emui is 5.0.1 if i remember right. its data compatible? are the data the cause of no sound? thanks
ALL WORKED FINE , ALL SOLVED. currently b391 (latest) emui 5.0.1 and all my data, super happy thank you
2EDIT: nfc chip still not work, when selected emui crash. minor problem..
note: twrp by (that you said) didn't work in emui 5+ i'm using newer revolution based one twrp 3.03

Franseven said:
it worked with the dns method not the proxy (was keeping redownload infinite patch over 4gigs tot crazy)
i'm now back at b381 with sound but without my data, i'm trying to reach b389 and over, can i restore through twrp only data partition without a hitch?
in b389 emui is 5.0.1 if i remember right. its data compatible? are the data the cause of no sound? thanks
ALL WORKED FINE , ALL SOLVED. currently b391 (latest) emui 5.0.1 and all my data, super happy thank you
2EDIT: nfc chip still not work, when selected emui crash. minor problem..
note: twrp by (that you said) didn't work in emui 5+ i'm using newer revolution based one twrp 3.03
Click to expand...
Click to collapse
FF works with proxy fine, but you must first download and install Firmware finder proxy apk. On Nougat use TWRP 3.1.0-2.
---------- Post added at 21:03 ---------- Previous post was at 20:59 ----------
Franseven said:
it worked with the dns method not the proxy (was keeping redownload infinite patch over 4gigs tot crazy)
i'm now back at b381 with sound but without my data, i'm trying to reach b389 and over, can i restore through twrp only data partition without a hitch?
in b389 emui is 5.0.1 if i remember right. its data compatible? are the data the cause of no sound? thanks
ALL WORKED FINE , ALL SOLVED. currently b391 (latest) emui 5.0.1 and all my data, super happy thank you
2EDIT: nfc chip still not work, when selected emui crash. minor problem..
note: twrp by (that you said) didn't work in emui 5+ i'm using newer revolution based one twrp 3.03
Click to expand...
Click to collapse
FF works with proxy , but you must download and install Firmware finder proxy apk. On Nougat use TWRP 3.1.0-2.
OMG, sorry !

[WORKING] Information for users that want to install B121 (EU) firmware

As many people asked Huawei if we can install the B121 first and official firmware that was released to Honor 7, ive figured out how to do that becuase every one thought that you just only need that rollback package to "enter" Android 5.0, well it doesnt work like that becuase Huawei said that you need to give youre device to youre local retailer in order to install the first and official firmware, but ive figured it out how it works:
1*.)If you rollback from B396 you will be downgraded to version B300, as you see thats not B121, thats a must if you want to enter step 2, SO
2.)you have to download the B121 firmware: http://www.carbontesla.com/2016/02/download-honor-7-b121-lollipop-emui-3-1-firmware-europe/
3.)then from that B300 firmware that youre using create that dload folder on youre Honor 7 and paste the update.app file (B121) into that folder
4.) hold power,plus,minus volume key the honor logo will appear !!!KEEP PRESSING!!! when this emui logo will appear "veryfing update info" you just wait
5.)Viola you have a B121 system
*Ive tried to install from B396 firmware down to B121 it did not work idk if Huawei is blocking something cause it keeps bootlooping or I try like the 3rd time it starts installing something but then an error appers maybe you can just and ONLY install Android 5.0 (B121) firmware from B300.
*I flashed my device with TWRP repacked the (B121) firmware with Huawei update extractor so that i could grab the recovery.img file to flash with Android SDK in order to install B121 it didnt work
*reflashed the B396 recovery with Android SDK in order to install B121 it also didnt work
*WARNING* You are doing it at youre own risk, I am not responsible for any damages due to bricked phones or broken ones
*REMEMBER* Doing this procedure you have to backup youre pictures/files to computer or use HiSuite.

[SOLVED] NRD90M test-keys - Nougat Stock Firmware Huawei Mate 8

Hi all,
I just want to share with you all how i solved NRD90M test-keys on my Mate 8. 2 weeks ago, I've successful to debrand from L29 to AL10 and updated to Oreo EMUI 8. After awhile, i found bugs or error when i connected to PC or Laptop, my phone will go haywire like someone is touching the screen everywhere. I suspected it might be came from cust.img that i flashed to make sim and data detect.
Then i made a decision to debrand again to DL00, and successfully rollback to MM B386 using Hisuite version 8. After that i flashed dualcu_cn.zip using TWRP and successful to debrand to DL00. I checked the OTA update, there is DL00C00B577 Nougat update and i download and installed it. My Mate 8 became NRD90M test-keys after successfully updated to Nougat. For one and a half day i searched in internet and XDA on how to get rid of NRD90M test-keys and update to next build of Nougat. On XDA, I've found several thread regarding NRD90M test-keys like https://forum.xda-developers.com/mate-8/general/info-rom-nrd90m-test-keys-android-7-0-t3750147, https://forum.xda-developers.com/mate-8/help/nrd90m-test-keys-t3549124 and https://forum.xda-developers.com/mate-8/help/stuck-nrd90m-test-keys-t3590461 but without proper steps and procedures. So people like me a noob or newbies will stuck on how to solve the problem. So I've do some test for my Mate 8 by using one of this methods which are HuRUpdater, HWOTA and erecovery. I can said that 90% of chances rate it will success but you'll need to download FullOTA-MF stock firmware. I'm using erecovery so no need to download it.
Requirement:
1. Unlocked bootloader
2. TWRP Installed
3. HuRUpdater - Link : https://forum.xda-developers.com/honor-9/development/tool-flash-official-firmware-recovery-t3769279
4. HWOTA - Link: https://cloud.mail.ru/public/DEWc/a9fDVbgpz
5. update.zip - FullOTA-MF (for me NXT-DL00C17B592-full in erecovery)
6. update_all_hw.zip
7. update_data_public.zip
8. Back up your data using HiSuite or SD card.
Instruction
Method 1 using HuRUpdater
1. Make sure your bootloader is unlocked and TWRP is installed.
2. Download HuRUpdater.zip, update.zip-FullOTA-MF (your stock firmware), update_all_hw.zip and update_data_public.zip.
3. Make a new folder in SD Card root (you can name it base on its firmware) and put all the zips that you already downloaded in the folder.
4. Boot your Mate 8 to TWRP and choose sd card > folder > HuRUpdater.zip. It'll reboot into recovery and start flash firmware.
5. Your phone will update to the newest build number base on your stock firmware.
6. You can follow the steps in this link https://forum.xda-developers.com/honor-9/development/tool-flash-official-firmware-recovery-t3769279
Method 2 using HWOTA
1. Make sure your bootloader is unlocked and TWRP is installed.
2. Download HWOTA.zip, update.zip-FullOTA-MF (your stock firmware), update_all_hw.zip and update_data_public.zip.
3. Extract HWOTA.zip into HWOTA folder in your PC and put all the zips that you already downloaded in that folder. Copy HWOTA folder in your SD Card.
4. Boot your Mate 8 to TWRP and choose HWOTA folder and select nxt_hwota_update.zip. It'll reboot into recovery and start flash firmware.
5. Your phone will update to the newest build number base on your stock firmware.
6. You can follow the steps in this link https://forum.xda-developers.com/mat...ate-8-t3785320. This HWOTA.zip also can use to flash OREO EMUI 8 firmware.
P/S: I think HuRUpdater and HWOTA is the same method but using different script binary.
Method 3 using eRecovery
1. Press Vol + and Power button at the same time for 3-5 sec.
2. Choose your WIFI (need strong connection), if not it will failed to download recovery firmware.
3. If your WIFI have a strong connection it'll start to download recovery firmware and install.
4. Wait until finish installation
5. Your phone will update to the newest build number base on your stock firmware.
P/S: If you're using C636,C432,C185, i think it's useless. because i'm from C636 it's never captured the recovery firmware. so in case if your phone bricked or test keys, you can use HuRUpdater method. This method only working on chinese variants is what i think.
Additional info:
DESCRIPTION FOR FIRMWARE
1- OTA Firmware: (Over The Air) That mean the update file can install on the available os and upgrade or fix some bugs. (if the update build number is compatible with your phone).
2- FullOTA: Full OTA firmware is Full package of firmware and it can unbrick your phone.
3- FullOTA-MF: Full OTA MF firmware is Full package of firmware and it can unbrick your phone model with any buid number.
4- FullOTA-PV: Full OTA PV firmware is a Point-Version firmware, which means it can unbrick your phone depend on build number.
5- OTA-PV: Point-Version, such firmware are designed to update from one version of android to another. (build number is important)
6- OTA-MF: MF is a multi-file firmware, which means that there are several update packages in it.
Source : http://huawei-firmware.com/pages/ext/a/description/index.html
All thanks goes to @zxz0O0 for HurUpdater.zip, @apat26 for his thread HWOTA, 4pda forum and Huawei community.

ceriqdesign said:
Hi all,
I just want to share with you all how i solved NRD90M test-keys on my Mate 8. 2 weeks ago, I've successful to debrand from L29 to AL10 and updated to Oreo EMUI 8. After awhile, i found bugs or error when i connected to PC or Laptop, my phone will go haywire like someone is touching the screen everywhere. I suspected it might be came from cust.img that i flashed to make sim and data detect.
Then i made a decision to debrand again to DL00, and successfully rollback to MM B386 using Hisuite version 8. After that i flashed dualcu_cn.zip using TWRP and successful to debrand to DL00. I checked the OTA update, there is DL00C00B577 Nougat update and i download and installed it. My Mate 8 became NRD90M test-keys after successfully updated to Nougat. For one and a half day i searched in internet and XDA on how to get rid of NRD90M test-keys and update to next build of Nougat. On XDA, I've found several thread regarding NRD90M test-keys like https://forum.xda-developers.com/mate-8/general/info-rom-nrd90m-test-keys-android-7-0-t3750147, https://forum.xda-developers.com/mate-8/help/nrd90m-test-keys-t3549124 and https://forum.xda-developers.com/mate-8/help/stuck-nrd90m-test-keys-t3590461 but without proper steps and procedures. So people like me a noob or newbies will stuck on how to solve the problem. So I've do some test for my Mate 8 by using one of this methods which are HuRUpdater, HWOTA and erecovery. I can said that 90% of chances rate it will success but you'll need to download FullOTA-MF stock firmware. I'm using erecovery so no need to download it.
Requirement:
1. Unlocked bootloader
2. TWRP Installed
3. HuRUpdater - Link : https://forum.xda-developers.com/honor-9/development/tool-flash-official-firmware-recovery-t3769279
4. HWOTA - Link: https://cloud.mail.ru/public/DEWc/a9fDVbgpz
5. update.zip - FullOTA-MF (for me NXT-DL00C17B592-full in erecovery)
6. update_all_hw.zip
7. update_data_public.zip
8. Back up your data using HiSuite or SD card.
Instruction
Method 1 using HuRUpdater
1. Make sure your bootloader is unlocked and TWRP is installed.
2. Download HuRUpdater.zip, update.zip-FullOTA-MF (your stock firmware), update_all_hw.zip and update_data_public.zip.
3. Make a new folder in SD Card root (you can name it base on its firmware) and put all the zips that you already downloaded in the folder.
4. Boot your Mate 8 to TWRP and choose sd card > folder > HuRUpdater.zip. It'll reboot into recovery and start flash firmware.
5. Your phone will update to the newest build number base on your stock firmware.
6. You can follow the steps in this link https://forum.xda-developers.com/honor-9/development/tool-flash-official-firmware-recovery-t3769279
Method 2 using HWOTA
1. Make sure your bootloader is unlocked and TWRP is installed.
2. Download HWOTA.zip, update.zip-FullOTA-MF (your stock firmware), update_all_hw.zip and update_data_public.zip.
3. Extract HWOTA.zip into HWOTA folder in your PC and put all the zips that you already downloaded in that folder. Copy HWOTA folder in your SD Card.
4. Boot your Mate 8 to TWRP and choose HWOTA folder and select nxt_hwota_update.zip. It'll reboot into recovery and start flash firmware.
5. Your phone will update to the newest build number base on your stock firmware.
6. You can follow the steps in this link https://forum.xda-developers.com/mat...ate-8-t3785320. This HWOTA.zip also can use to flash OREO EMUI 8 firmware.
P/S: I think HuRUpdater and HWOTA is the same method but using different script binary.
Method 2 using eRecovery
1. Press Vol + and Power button at the same time for 3-5 sec.
2. Choose your WIFI (need strong connection), if not it will failed to download recovery firmware.
3. If your WIFI have a strong connection it'll start to download recovery firmware and install.
4. Wait until finish installation
5. Your phone will update to the newest build number base on your stock firmware.
P/S: If you're using C636,C432,C185, i think it's useless. because i'm from C636 it's never captured the recovery firmware. so in case if your phone bricked or test keys, you can use HuRUpdater method. This method only working on chinese variants is what i think.
Additional info:
DESCRIPTION FOR FIRMWARE
1- OTA Firmware: (Over The Air) That mean the update file can install on the available os and upgrade or fix some bugs. (if the update build number is compatible with your phone).
2- FullOTA: Full OTA firmware is Full package of firmware and it can unbrick your phone.
3- FullOTA-MF: Full OTA MF firmware is Full package of firmware and it can unbrick your phone model with any buid number.
4- FullOTA-PV: Full OTA PV firmware is a Point-Version firmware, which means it can unbrick your phone depend on build number.
5- OTA-PV: Point-Version, such firmware are designed to update from one version of android to another. (build number is important)
6- OTA-MF: MF is a multi-file firmware, which means that there are several update packages in it.
Source : http://huawei-firmware.com/pages/ext/a/description/index.html
All thanks goes to @zxz0O0 for HurUpdater.zip, @apat26 for his thread HWOTA, 4pda forum and Huawei community.
Click to expand...
Click to collapse
hello, in the meantime I thank you my mate8 is much improved the only problem is that I am still in NRD90M test-keys.

manuele16 said:
hello, in the meantime I thank you my mate8 is much improved the only problem is that I am still in NRD90M test-keys.
Click to expand...
Click to collapse
are you using HuRUpdater method?can you give me more info about your mate 8

ceriqdesign said:
are you using HuRUpdater method?can you give me more info about your mate 8
Click to expand...
Click to collapse
Of course...
Model number: NXT
No. Series: NRD90M Test Keys
Emui: 5.0
Android: 7.0
Vendor: hw
Country: meafnaf
please consider that my goal is to make it NXT-L29C432.
Originally on the box is reported NXT-AL10

manuele16 said:
Of course...
Model number: NXT
No. Series: NRD90M Test Keys
Emui: 5.0
Android: 7.0
Vendor: hw
Country: meafnaf
please consider that my goal is to make it NXT-L29C432.
Originally on the box is reported NXT-AL10
Click to expand...
Click to collapse
So originally you came from NXT-AL10 and without changing oeminfo with SRK Tool then you used the HuRUpdater?
Is it your bootloader still unlocked or locked?

I did not change oeminfo, or rather I tried with SRK tool, but I did not succeed.
Yes, I used HuRUpdater.
Bootloader unlocked

manuele16 said:
I did not change oeminfo, or rather I tried with SRK tool, but I did not succeed.
Yes, I used HuRUpdater.
Bootloader unlocked
Click to expand...
Click to collapse
I managed to get Vendor: hw and Country: eu.
but I'm still in nrd90

manuele16 said:
I did not change oeminfo, or rather I tried with SRK tool, but I did not succeed.
Yes, I used HuRUpdater.
Bootloader unlocked
Click to expand...
Click to collapse
Yup no wonder you're on NRD90M..you need to change oeminfo first before flash c432 firmware..

TWRP Huawei mate 8
Hello, my people, how are you?
I have a doubt, the truth is I am very new in this.
I have a Huawei Mate 8 NXT-L29 which updates to Android 7 with an app called "Firmware Finder for Huawei" and then I started my problems, the clock does not work, I can not enter the updater among others. What I would like is to change that rom for another or if it were for a stock.
I have the bootloader open and a TWRP (twrp-3.2.3-0-next) which is the only one that has worked for me but I have not been able to install another rom it tells me this: "error when dismounting" / '/ cust /' (invalid argument) and I do not know what I'm doing wrong ...
the compilation that this app left me is: NRD90M test-keys
and the rom that I want to install is: NXTL26C605B580
I would like to know your recommendations and corrections to what I am doing and thank you and I apologize for my English, which is very bad!

riky26 said:
Hello, my people, how are you?
I have a doubt, the truth is I am very new in this.
I have a Huawei Mate 8 NXT-L29 which updates to Android 7 with an app called "Firmware Finder for Huawei" and then I started my problems, the clock does not work, I can not enter the updater among others. What I would like is to change that rom for another or if it were for a stock.
I have the bootloader open and a TWRP (twrp-3.2.3-0-next) which is the only one that has worked for me but I have not been able to install another rom it tells me this: "error when dismounting" / '/ cust /' (invalid argument) and I do not know what I'm doing wrong ...
the compilation that this app left me is: NRD90M test-keys
and the rom that I want to install is: NXTL26C605B580
I would like to know your recommendations and corrections to what I am doing and thank you and I apologize for my English, which is very bad!
Click to expand...
Click to collapse
Sorry for late reply as for now i'm quite busy with life..can you tell me what your model before you change to NXTL26C605B580?