How to downgrade a Rooted, Bootloader unlocked P9 Lite from Android 7 to Android 6? - Android Q&A, Help & Troubleshooting

Hello fellow xda members helpers and developers
I need to downgrade my Phone from Android 7 Build: C432B370 to Android 6
What do I need to make sure of in my Huawei P9 Lite Android 7 Emui 5 before following the Rollback/software upgrade procedure described in the respective Zip files.
Do I need to unroot and relock ? .. If yes which version of recovery or TWRP do I need.. if I am going to rollback.
I am a little hesitant at the moment becouse I managed to get into a bootloop yesterday by just flashing recovery_stock .
I am guessing it is becouse I unawarely flashed the wrong recovery_stock(?)
Recovery/Fastboot mode were not availiable - and then tried to flash the rollback via 3 button method.. which of course did not work.
( In case you are wondering how I managed to fix this: I let the battery drain to 0% - this broke the loop - afte the fifth try I managed to reset it with volume up + power all the way through booting)
So now I am back to square one..
Thank you

ok so I managed to fix this by myself: The problem I had was, I had a corrupted/wrong recovery on my Android 7.
So what I did was, I checked which build I excactly had .. in my case C432B370 ... downloaded the full rom. Extracted the stock recovery.img with "HuaweiUpdateExtractor" and flashed it.
Then I did the normal rollback procedure with both update.app files.
Had to unlock and root it once more... ( this time with the correct twrp) and voila it works.
So what do we learn?: dont trust simple internet guides if they not offer informations on file versions they offer ... they may not use the correct versions for your phone.
thrad can be closed or deleted
thanks for looking

Related

[SOLVED] Bricked + Formated my Honor 7. Need a ROM

Hey guys,
I've had a total of 4 android smartphones during the last years, and I did root all of them and even install diferent ROM's, but on this phone (Honor 7) was kinda diferent.
The root process is way more complex than all the other androids I did root (simply flash a .zip file...) so I've been post-poning this task over and over..
Finally yesterday I gained courage to try out rooting my phone, and while attempting to root my Honor 7, after flashing SuperSU from TWRP, my phone no longer booted.
Stressed as I was, I just told to myself "f*ck it" and formatted the system and I didn't care much if there was a fix without needing to format the system. (but then I realised that I could not find any .img ROM files to flash from TWRP recovery, so basically I did my actions wrong once again)
I followed the tutorial from guidebeats.com which talks about rooting EMUI 4.0 Android 6.0 (I cant post links)
Basically this is the story:
While unlocking the bootloader, even though, the tutorial said the phone would reboot itself after typing "flashboot oem unlock 1234934829" I did a hard reboot (or reset?) holding (VOL+) + Power button and I have the feeling that the bootloader unlock was not 100% done, even if it said it was unlocked. (Phone was working perfectly fine there)
Then I flashed SuperSU, and I could no longer boot. After powering up my phone, after the first splashscreen, the screen would only turn black.
What (I think) I need to now is remove the TWRP recovery, and use the stock one and attempt to install an "update" using (Vol+) + (Vol-) + Power. (please correct me if I'm wrong)
But now there's some issues I got that I'd like some help with:
1- How can I get back to the stock recovery? (NOTE: I currently got no OS installed on my Honor 7, since I formated it)
2- Will I need to lock and unlock my bootloader again (if I want to 'fix' the bootloader unlock?)
3- Where can I get official Honor 7 stock ROM? (would be awesome if there was already the Android 6 stock rom for a clean install)
4- What are the steps on this tool (Honor 7 Multi-Tool) to root my phone?
I need my Honor 7 asap
Sorry for the long post, It's my first time doing a more advanced root and I have all these questions.
Thank you very much for any kind help!
joaomPT said:
Hey guys,
I've had a total of 4 android smartphones during the last years, and I did root all of them and even install diferent ROM's, but on this phone (Honor 7) was kinda diferent.
The root process is way more complex than all the other androids I did root (simply flash a .zip file...) so I've been post-poning this task over and over..
Finally yesterday I gained courage to try out rooting my phone, and while attempting to root my Honor 7, after flashing SuperSU from TWRP, my phone no longer booted.
Stressed as I was, I just told to myself "f*ck it" and formatted the system and I didn't care much if there was a fix without needing to format the system. (but then I realised that I could not find any .img ROM files to flash from TWRP recovery, so basically I did my actions wrong once again)
I followed the tutorial from guidebeats.com which talks about rooting EMUI 4.0 Android 6.0 (I cant post links)
Basically this is the story:
While unlocking the bootloader, even though, the tutorial said the phone would reboot itself after typing "flashboot oem unlock 1234934829" I did a hard reboot (or reset?) holding (VOL+) + Power button and I have the feeling that the bootloader unlock was not 100% done, even if it said it was unlocked. (Phone was working perfectly fine there)
Then I flashed SuperSU, and I could no longer boot. After powering up my phone, after the first splashscreen, the screen would only turn black.
What (I think) I need to now is remove the TWRP recovery, and use the stock one and attempt to install an "update" using (Vol+) + (Vol-) + Power. (please correct me if I'm wrong)
But now there's some issues I got that I'd like some help with:
1- How can I get back to the stock recovery? (NOTE: I currently got no OS installed on my Honor 7, since I formated it)
2- Will I need to lock and unlock my bootloader again (if I want to 'fix' the bootloader unlock?)
3- Where can I get official Honor 7 stock ROM? (would be awesome if there was already the Android 6 stock rom for a clean install)
4- What are the steps on this tool (Honor 7 Multi-Tool) to root my phone?
I need my Honor 7 asap
Sorry for the long post, It's my first time doing a more advanced root and I have all these questions.
Thank you very much for any kind help!
Click to expand...
Click to collapse
As you are already familiar with adb and other stuff so will write a short post for you.
To download latest firmware, head to
http://forum.xda-developers.com/hon...tock-firmware-packages-honor-7-t3448747/page1
Google, download and install Huawei update extractor and open UPDATE.APP in it (obtained after extracting firmware).
You can see all the images. Just extract recovery and boot to platform-tools folder.
Meantime, do the unlocking command again, with
Fastboot OEM unlock xxxxxxxxxxxxxxxx
Followed by fastboot reboot
And press and hold the vol down button again until you reboot in bootloader.
Flash the recovery and boot you extracted using
Fastboot flash recovery recovery.img
Fastboot flash boot boot.img
(I got a habit of extracting and flashing system and Cust using
Fastboot flash system system.img
Fastboot flash Cust Cust.img
But they are not necessary)
Now you are set to try a 3 button update (sometimes it gets stuck so if it's stuck for 15 minutes, try 3 button again).
Please do report back if it comes to life.
To root, just flash twrp and then use SuperSU 2.62 (no other version) and update it later using play store.
Sent from my PLK-L01 using XDA Labs
Hey!
Thank you alot for your reply.
From the link you sent about the firmwares, there are alot of Builds for the L01 (EU) model. Can I simply use the latest from the list or I gotta install 1 by 1 (from older to newer)?
Also, the bootloader unlock thing, is it ok if I wait to do it until I install the stock ROM again? Because I think I don't have the code anymore (Also don't know about IMEI)
Other thing, yesterday before bricking my phone, I tried to re-unlock the bootloader as you said above, but it didnt let me because "it was already unlocked".
I really have no idea if it's 100% unlocked or not.
important thing!
With those ROM's, I still have the right to receive official OTA updates from the HiCare app right?
Thank you again
joaomPT said:
Hey!
Thank you alot for your reply.
From the link you sent about the firmwares, there are alot of Builds for the L01 (EU) model. Can I simply use the latest from the list or I gotta install 1 by 1 (from older to newer)?
Also, the bootloader unlock thing, is it ok if I wait to do it until I install the stock ROM again? Because I think I don't have the code anymore (Also don't know about IMEI)
Other thing, yesterday before bricking my phone, I tried to re-unlock the bootloader as you said above, but it didnt let me because "it was already unlocked".
I really have no idea if it's 100% unlocked or not.
important thing!
With those ROM's, I still have the right to receive official OTA updates from the HiCare app right?
Thank you again
Click to expand...
Click to collapse
Just use B380 as it's the latest full firmware available there.
Unlocking bootloader again was just a precautionary measure (proceed without it and if it is not 100% unlocked and if something goes wrong, we can troubleshoot later, which imo, won't happen)
And yep, if you keep the firmware as it is, but if you flash twrp and root, you will still see the update available in Hicare but will have to install stock recovery again before upgrading. (Nothing else is needed as SuperSU 2.62 gives a systemless root so you only need to flash back stock recovery for an update)
I am not against honor-tool bit it's best to do things manually as it makes you learn stuff and is easy to troubleshoot if something is amiss.
Sent from my PLK-L01 using XDA Labs
muradulislam said:
Just use B380 as it's the latest full firmware available there.
Unlocking bootloader again was just a precautionary measure (proceed without it and if it is not 100% unlocked and if something goes wrong, we can troubleshoot later, which imo, won't happen)
And yep, if you keep the firmware as it is, but if you flash twrp and root, you will still see the update available in Hicare but will have to install stock recovery again before upgrading. (Nothing else is needed as SuperSU 2.62 gives a systemless root so you only need to flash back stock recovery for an update)
I am not against honor-tool bit it's best to do things manually as it makes you learn stuff and is easy to troubleshoot if something is amiss.
Sent from my PLK-L01 using XDA Labs
Click to expand...
Click to collapse
Alright, btw, about the thing you said
"Now you are set to try a 3 button update (sometimes it gets stuck so if it's stuck for 15 minutes, try 3 button again)."
I gotta do that myself with an "update.app" file or what?
Sorry, I missed that part
Cheers!
joaomPT said:
Alright, btw, about the thing you said
"Now you are set to try a 3 button update (sometimes it gets stuck so if it's stuck for 15 minutes, try 3 button again)."
I gotta do that myself with an "update.app" file or what?
Sorry, I missed that part
Cheers!
Click to expand...
Click to collapse
You have to make a dload folder in SD card and copy UPDATE.APP to that folder.
Then just turn off the phone, press and hold power + vol up + vol down until phone boots.
Let go of power but keep others two pressed for 5, 6 sec more. Your phone will boot into recovery and start installing UPDATE.APP
It likes to get stuck at 5% (most reports) but sometimes, somewhere else. If its stuck for 15 minutes on a particular percentage, just press and hold the above three buttons again using the same process.
Multiple tries make it work...
Sent from my PLK-L01 using XDA Labs
muradulislam said:
You have to make a dload folder in SD card and copy UPDATE.APP to that folder.
Then just turn off the phone, press and hold power + vol up + vol down until phone boots.
Let go of power but keep others two pressed for 5, 6 sec more. Your phone will boot into recovery and start installing UPDATE.APP
It likes to get stuck at 5% (most reports) but sometimes, somewhere else. If its stuck for 15 minutes on a particular percentage, just press and hold the above three buttons again using the same process.
Multiple tries make it work...
Sent from my PLK-L01 using XDA Labs
Click to expand...
Click to collapse
Hey man!
Good news, my phone is alive and root is done.
The problem was on the SuperSU that I flashed, it was version 2.71, instead of the one you said » version 2.62 «
I cant thank you enough!! Can I pay you a coffee?
Thank you!
joaomPT said:
Hey man!
Good news, my phone is alive and root is done.
The problem was on the SuperSU that I flashed, it was version 2.71, instead of the one you said �?�» version 2.62 �?�«
I cant thank you enough!! Can I pay you a coffee?
Thank you!
Click to expand...
Click to collapse
That's great... Enjoy your phone and as for coffee, well, let's say, you owe me one and we will leave it at that
Better yet, you can search DigiGoon and pay him for the coffee, he taught me what I told you.
You can find him somewhere in this thread
http://forum.xda-developers.com/honor-5x/help/honor-5x-kiw-ul00-boot-loop-t3449554/page1
Decision is yours
muradulislam said:
That's great... Enjoy your phone and as for coffee, well, let's say, you owe me one and we will leave it at that
Better yet, you can search DigiGoon and pay him for the coffee, he taught me what I told you.
Whichever you like...
Click to expand...
Click to collapse
Alright man, cheers
joaomPT said:
Alright man, cheers
Click to expand...
Click to collapse
Hello
How did you format your phone?
I'm still struggling with going back to Android 5 and EMUI 3.1 since there is no rollback file available. (PLK-AL10, B396) Maybe formatting and installing the old rom could be a solution, like in your case?
tgergo said:
Hello
How did you format your phone?
I'm still struggling with going back to Android 5 and EMUI 3.1 since there is no rollback file available. (PLK-AL10, B396) Maybe formatting and installing the old rom could be a solution, like in your case?
Click to expand...
Click to collapse
Hello.
Do you have unlocked bootloader and TWRP recovery? You can format your phone from TWRP recovery.
I think the only option for you is to get the old ROM img and flash it (starting from 0)
You can dirty-flash (Flash a different ROM with same android version as yours, e.g: flashing custom android 5 ROM over your stock android 5 ROM without factory resetting your phone) but I dont think you can do that from Android 6 to 5.
joaomPT said:
Hello.
Do you have unlocked bootloader and TWRP recovery? You can format your phone from TWRP recovery.
I think the only option for you is to get the old ROM img and flash it (starting from 0)
You can dirty-flash (Flash a different ROM with same android version as yours, e.g: flashing custom android 5 ROM over your stock android 5 ROM without factory resetting your phone) but I dont think you can do that from Android 6 to 5.
Click to expand...
Click to collapse
Yes I have unlocked bootloader and currently not twrp but I can flash it at any time.
The last two paragraphs you wrote are different solutions or the last one is a more detailed explanation of the previous?
I have android 6 so the later method won't work as you said.
But formatting it and flashing a stock android 5 rom - is it that simple? Nobody here suggested this before, however I have been asking for months.
All the phones are empty when they leave the assembly line.
How did you flash the new rom to your formatted phone? Extracted update.app and flashed each file with fastboot? Any issues you faced?
tgergo said:
Yes I have unlocked bootloader and currently not twrp but I can flash it at any time.
The last two paragraphs you wrote are different solutions or the last one is a more detailed explanation of the previous?
I have android 6 so the later method won't work as you said.
But formatting it and flashing a stock android 5 rom - is it that simple? Nobody here suggested this before, however I have been asking for months.
All the phones are empty when they leave the assembly line.
How did you flash the new rom to your formatted phone? Extracted update.app and flashed each file with fastboot? Any issues you faced?
Click to expand...
Click to collapse
From my last 2 paragraphs, the first was a solution, the second was an impossible alternative that I thought it would work.
My issue was that I had a custom recovery but I had no ROM installed, so I had to install the stock recovery and boot (extracting from update.app) and flashing it via fastboot, to afterwards force the update with 3-button method.
-----
What you'll need to do is:
- Flash TWRP
- Wype system, data, cache.. (so that you completely delete your current ROM)
- Extract recovery.img and boot.img from an update.app of an Android 5 ROM you'd like to have (Official ROM for your device model)
- Flash them via fastboot (You'll go back to stock recovery again)
- Shutdown your device
- Create a folder named "dload" on your sdcard and put UPDATE.APP file in it.
- Reboot
- Do the 3-Button update ([Vol+] + [Vol-] + Power)
- If it works, it will auto install
(- If it gets stuck on 5% for over 5/10min, force reboot pressing [Vol+] + Power) and try again the installation
- After installing it will boot normally (first boot takes a while)
NOTE: I'd recommend creading the dload folder before wiping the ROM, because usb didnt work for me afterwards. (It would still work if I was on recovery tho)
>> Remember to make a full system backup before wiping aswell, dont be stupid like me xD (thats why I had to full wipe my system after soft-brick)
Im answering based on what I did and was explained here to me
joaomPT said:
From my last 2 paragraphs, the first was a solution, the second was an impossible alternative that I thought it would work.
My issue was that I had a custom recovery but I had no ROM installed, so I had to install the stock recovery and boot (extracting from update.app) and flashing it via fastboot, to afterwards force the update with 3-button method.
-----
What you'll need to do is:
- Flash TWRP
- Wype system, data, cache.. (so that you completely delete your current ROM)
- Extract recovery.img and boot.img from an update.app of an Android 5 ROM you'd like to have (Official ROM for your device model)
- Flash them via fastboot (You'll go back to stock recovery again)
- Shutdown your device
- Create a folder named "dload" on your sdcard and put UPDATE.APP file in it.
- Reboot
- Do the 3-Button update ([Vol+] + [Vol-] + Power)
- If it works, it will auto install
(- If it gets stuck on 5% for over 5/10min, force reboot pressing [Vol+] + Power) and try again the installation
- After installing it will boot normally (first boot takes a while)
NOTE: I'd recommend creading the dload folder before wiping the ROM, because usb didnt work for me afterwards. (It would still work if I was on recovery tho)
>> Remember to make a full system backup before wiping aswell, dont be stupid like me xD (thats why I had to full wipe my system after soft-brick)
Im answering based on what I did and was explained here to me
Click to expand...
Click to collapse
I'll try... But seems too simple to be true...
joaomPT said:
From my last 2 paragraphs, the first was a solution, the second was an impossible alternative that I thought it would work.
My issue was that I had a custom recovery but I had no ROM installed, so I had to install the stock recovery and boot (extracting from update.app) and flashing it via fastboot, to afterwards force the update with 3-button method.
-----
What you'll need to do is:
- Flash TWRP
- Wype system, data, cache.. (so that you completely delete your current ROM)
- Extract recovery.img and boot.img from an update.app of an Android 5 ROM you'd like to have (Official ROM for your device model)
- Flash them via fastboot (You'll go back to stock recovery again)
- Shutdown your device
- Create a folder named "dload" on your sdcard and put UPDATE.APP file in it.
- Reboot
- Do the 3-Button update ([Vol+] + [Vol-] + Power)
- If it works, it will auto install
(- If it gets stuck on 5% for over 5/10min, force reboot pressing [Vol+] + Power) and try again the installation
- After installing it will boot normally (first boot takes a while)
NOTE: I'd recommend creading the dload folder before wiping the ROM, because usb didnt work for me afterwards. (It would still work if I was on recovery tho)
>> Remember to make a full system backup before wiping aswell, dont be stupid like me xD (thats why I had to full wipe my system after soft-brick)
Im answering based on what I did and was explained here to me
Click to expand...
Click to collapse
Hi again,
I'm doing this OS installation now. It starts fine but stucks at 90%, (I'm trying to install the latest stock ROM which can be downloaded from Huawei site, B220 or221). Did you have the same issue? I waited more than half an hour at 90% but did not go on.
tgergo said:
Hello
How did you format your phone?
I'm still struggling with going back to Android 5 and EMUI 3.1 since there is no rollback file available. (PLK-AL10, B396) Maybe formatting and installing the old rom could be a solution, like in your case?
Click to expand...
Click to collapse
Maybe formatting, Flash stock Android 5 recovery using Honor multitool , and then Flash a Android 5 firmware
Not sure it Will Work without rollback..
Finally, after 2 months of struggling I managed to get back to Android 5 and EMUI 3.1 without a rollback file.
Here is what I did:
0. Download a full ROM you want to install
1. Backup of the current system with Hisuite (everything. Apps, media, contacts, call log, etc.)
2. Flash TWRP recovery with fastboot (start phone in fastboot mode)
3. Wipe (and format!) everything you can with TWRP
4. Extract boot.img and recovery.img from update.app of the new ROM with Huawei Update Extractor
5. Flash boot.img and recovery.img with fastboot.
6. Copy update app to dload folder on SD card, insert into the phone.
7. Restart phone with [VOL+] + [VOL-] + [Power] buttons to force update.
8. The system will be installed from SD card. I had no issues with the installation. First I did not format the phone (just wiped) and it did not work.
9. Restore data from backup.
The only strange thing is that the native app icons look different than my previous lollipop system. Don't know why. They are less colorful. I installed C00B220 for PLK-AL10.
tgergo said:
Finally, after 2 months of struggling I managed to get back to Android 5 and EMUI 3.1 without a rollback file.
Here is what I did:
0. Download a full ROM you want to install
1. Backup of the current system with Hisuite (everything. Apps, media, contacts, call log, etc.)
2. Flash TWRP recovery with fastboot (start phone in fastboot mode)
3. Wipe (and format!) everything you can with TWRP
4. Extract boot.img and recovery.img from update.app of the new ROM with Huawei Update Extractor
5. Flash boot.img and recovery.img with fastboot.
6. Copy update app to dload folder on SD card, insert into the phone.
7. Restart phone with [VOL+] + [VOL-] + [Power] buttons to force update.
8. The system will be installed from SD card. I had no issues with the installation. First I did not format the phone (just wiped) and it did not work.
9. Restore data from backup.
The only strange thing is that the native app icons look different than my previous lollipop system. Don't know why. They are less colorful. I installed C00B220 for PLK-AL10.
Click to expand...
Click to collapse
Is this really work? i cant rollback to any version.
Yuaru said:
Is this really work? i cant rollback to any version.
Click to expand...
Click to collapse
Yes it does. (It did for me.) Technically this is not a rollback but installing a brand new system on an empty phone. That's why it is important to do a backup upfront.
tgergo said:
Yes it does. (It did for me.) Technically this is not a rollback but installing a brand new system on an empty phone. That's why it is important to do a backup upfront.
Click to expand...
Click to collapse
Thanks for the answer. Im gonna try this method. I can't reflash any region rom.

[GUIDE][Experience] HOW TO unlock, flash TWRP and root your Huawei Mate 9 Pro (LON)

This thread applies to Huawei Mate 9 Pro only (model LON*, as M9Pro below). For Mate 9 (model MAH*) please go to the corresponding forum.
-----
Disclaimer:
I won't be responsible for bricked phone. Proceed with your own risk, make sure you know what you are doing.
This thread can be seen as a guide if your phone has exactly the same model and build version as mine. Otherwise please consider it as a description of my experiences for unlocking, flashing and rooting the phone.
SUPPORTED DEVICES:
LON-L29
LON-AL00
-----
As a start, this phone is great and I feel that it doesn’t need to be unlocked and rooted for a stable and long lasting daily use. However, unlock and root is almost a religion if you use Android phones
As a piece of info, big thanks to @raimondomartire, there is a thread for unlock, flash TWRP and root in the Mate 9 forum https://forum.xda-developers.com/mate-9/development/recovery-huawei-mate-9-pro-unofficial-t3546976, which is however according to my experience not totally applicable for the M9Pro anymore. There are also several other threads on the Mate 9 forum. Many things can be shared between both phones, but not always. Be careful about what you are doing!
-----
General info and attentions:
- My phone is M9Pro LON-AL00 (All net version from Chinese Mainland); LON-L29 (International version) should also work.
- This thread applies for build LON-AL00C00B213. Can be also applicable for similar builds, but I couldn’t test. Please report.
- None of the current builds of TWRP (up to 3.1.0) can decrypt data partition by default, which means you could only format the data partition in TWRP in order to access it in recovery (for backup to and install from internal storage etc.). But after formatting, you have to flash Huawei’s special stock data back to data partition (/data/hw_init), otherwise several functions of Huawei ROM won’t work. Refer to this (https://forum.xda-developers.com/showpost.php?p=71302827&postcount=627) or this (https://forum.xda-developers.com/showpost.php?p=72497328&postcount=204). Thanks to @gm007 and @ante0
- There are several root methods which handles encrypted or decrypted data partition. I didn’t format the data partition, i.e. data is still encrypted. If you want to format the data partition, please refer to this thread: https://forum.xda-developers.com/mate-9/how-to/guide-how-to-root-mate-9-decrypt-data-t3569986. Thanks to @eddmecha
- If you need stock ROM, refer to useful links below. Use Huawei Update Extractor to extract the individual partitions from the ROM: https://forum.xda-developers.com/showthread.php?t=2433454
-----
Unlock bootloader:
There is enough info in the internet about unlocking M9Pro’s bootloader. Just a few points to mention:
- Generally, you can follow the steps in @raimondomartire thread (https://forum.xda-developers.com/mate-9/development/recovery-huawei-mate-9-pro-unofficial-t3546976). But unlike he describes in his thread, there is no OEM Unlock options in the developer options anymore. Just use ADB to unlock.
- FRP unlock is not required!
- Huawei enables now a 14-day limitation, where you can officially get the bootloader unlock code 14 days after you first activate your Huawei ID on your phone and have logged in using your Huawei ID 14 CONSECUTIVE days.
- To go around this limitation, you can use dc-unlocker to get the bootloader code immediately. Google yourself
-----
Flash TWRP:
- Still, you can follow the steps in @raimondomartire thread (https://forum.xda-developers.com/mate-9/development/recovery-huawei-mate-9-pro-unofficial-t3546976).
- The image from this thread is 3.0.3, which has some bugs built in, especially when flashing SuperSU.
- You could use TWRP 3.1.0-1 from https://forum.xda-developers.com/mate-9/development/recovery-unofficial-twrp-huawei-mate-9-t3515617, but this one seems to have problem to be recognized as ADB device in recovery.
- There is a version 3.0.2 for Mate 9, which seems to have problem mounting USB-OTG.
- If your data partition is encrypted, you can only use ADB sideload or USB-OTG to install anything.
- If you want to do data wipe in TWRP, you have to flash Huawei’s special stock data back to data partition. See above general info and attentions.
-----
Root:
Firstly, thanks to @ante0 for explaining different flags in the root methods: https://forum.xda-developers.com/showpost.php?p=72504501&postcount=210. Some more discussions between us are also around this post.
I also tried several other root tools on the market (mobilego, vroot, YoRoot, OneClickRoot, iRoot etc.), NONE of them works.
As mentioned, there are different root methods around for unlocking M9Pro, depending on if you want to format your data partition. For me, I didn’t format, and SuperSU works for me. And the mate_9_pro_root.zip from @raimondomartire thread didn’t work for me.
I followed the steps below:
1. Get TWRP 3.1.0-1 (https://forum.xda-developers.com/mate-9/development/recovery-unofficial-twrp-huawei-mate-9-t3515617)
2. Disable fingerprint ID (I think it’s probably optional, but have read somewhere that fingerprint stops working after flashing root).
3. Flash stock boot image for B213D (in download section). I think it’s optional too, but if you have tried other methods before, you can do this step to make sure your boot is stock and clean
4. Flash TWRP 3.1.0-1
5. Flash SuperSU-v2.79-MATE9-init.d_support_no_decrypt-signed.zip (in download section) via USB-OTG (in TWRP the device is not recognized as an ADB device, hence no “ADB sideload”). Thanks to @ante0 for building this zip!
6. Reboot – phone will reboot itself twice and SuperSU.apk will be installed automatically
7. You could flash back to 3.0.3, if you want the ADB sideload function.
-----
Download:
- TWRP 3.0.3-1: https://forum.xda-developers.com/mate-9/development/recovery-huawei-mate-9-pro-unofficial-t3546976
- TWRP 3.1.0-1: https://forum.xda-developers.com/mate-9/development/recovery-unofficial-twrp-huawei-mate-9-t3515617
- SuperSU modified for M9Pro (thanks to @ante0): https://mega.nz/#!bR8D2Bab!bIgMLVmoll9R0GFqoFgkLxULrXlQ2710INt3TNbuI0c
- Boot image from B213D: https://mega.nz/#!LFlGTTZY!AaFq-_quM44YlK_Qdh9PgOjBE3Wtepmyz5OAuo_mabw
-----
Useful links:
- Stock firmware: http://hwmt.ru/oth/HWFF/info/view.php?find_model=lon
- Huawei Update (ROM) Extractor: https://forum.xda-developers.com/showthread.php?t=2433454
Enjoy your Mate!
Just some clarification: (eventhough you wrote it's for AL00C00B213, which I missed xD)
Flashing stock boot is only needed if you're already rooted.
Boot image B213D is only for AL00C00. If you have a different model/build, use the boot image for that specific build:
Download your stock firmware from hwmt.ru and Huawei Update Extractor. Extract update.app from your firmware zip.
Open update.app in Huawei Update Extractor. Rightclick on BOOT and click on Extract selected.
Flash the extracted boot.img using fastboot in download mode (fastboot flash boot boot.img).
OEM Unlocking is required to be enabled. It's just not there in the chinese version (AL00). So check if it's there first and enable if it is.
Hi guys. Not sure if this is the right place to ask but how do I get rid of that annoying "your device is unlocked and can't be trusted....etc " msg?
I have a mate 9 pro and I want to flash twrp and to root it. I did it for some one plus, xiaomi, samsung so I have some experience. reading xda posts about the case of M9pro I understood that is not a simple path and I dont want to hard brick the phone. what precautions should I take?
attached phone config
thank you in advance
ante0 said:
Just some clarification: (eventhough you wrote it's for AL00C00B213, which I missed xD)
Flashing stock boot is only needed if you're already rooted.
Boot image B213D is only for AL00C00. If you have a different model/build, use the boot image for that specific build:
Download your stock firmware from hwmt.ru and Huawei Update Extractor. Extract update.app from your firmware zip.
Open update.app in Huawei Update Extractor. Rightclick on BOOT and click on Extract selected.
Flash the extracted boot.img using fastboot in download mode (fastboot flash boot boot.img).
OEM Unlocking is required to be enabled. It's just not there in the chinese version (AL00). So check if it's there first and enable if it is.
Click to expand...
Click to collapse
hwmt. ru is unavailable
mcn1970 said:
hwmt. ru is unavailable
Click to expand...
Click to collapse
http://hwmt.ru/hwmtsite/firmware-database/
working fine for me.
Edit: I should probably have posted the full link in my previous post. Sorry.
ante0 said:
http://hwmt.ru/hwmtsite/firmware-database/
working fine for me.
Edit: I should probably have posted the full link in my previous post. Sorry.
Click to expand...
Click to collapse
is it all procedures safe? no risk of hard brick?
ante0 said:
Just some clarification: (eventhough you wrote it's for AL00C00B213, which I missed xD)
Flashing stock boot is only needed if you're already rooted.
Boot image B213D is only for AL00C00. If you have a different model/build, use the boot image for that specific build:
Download your stock firmware from hwmt.ru and Huawei Update Extractor. Extract update.app from your firmware zip.
Open update.app in Huawei Update Extractor. Rightclick on BOOT and click on Extract selected.
Flash the extracted boot.img using fastboot in download mode (fastboot flash boot boot.img).
OEM Unlocking is required to be enabled. It's just not there in the chinese version (AL00). So check if it's there first and enable if it is.
Click to expand...
Click to collapse
i unlocked the bootloader and flashed recovery but my OTG stick is not recognized and cannot be mounted. also while in recovery the phone is not seen on PC.
i tried with both recoveries above.
ADB sideload doesnt work...keeps saying starting ADB sideloading features...in TWRP sdcard content is a bunch of files with weird names...
therefore how can I root the phone?
someone please help me!!
mcn1970 said:
i unlocked the bootloader and flashed recovery but my OTG stick is not recognized and cannot be mounted. also while in recovery the phone is not seen on PC.
i tried with both recoveries above.
ADB sideload doesnt work...keeps saying starting ADB sideloading features...in TWRP sdcard content is a bunch of files with weird names...
therefore how can I root the phone?
someone please help me!!
Click to expand...
Click to collapse
edit: solved it
any OTA after?
hi guys. You may or may not find this interesting. I certainly did. I'll post this in the mate 9 pro forum as well but i just thought i could get some ideas from as many of guys as possible seeying that theres a lot more posts here for mate 9 in general.
I have chinese version mate 9 pro that has been rebranded from AL00 to LON Spcseas and rooted. Build number b228. Anyway i recently saw in FF the new b229 so i downloaded all three files which had longer file names than usuall by the way. In twrp, the only file that was visable was the update.zip. So i renamed the hw and public zip files to what they would usually be named. Wiped data, and flashed all three files. Then reflashed supersu.
This is the interesting bit ( i think ). My imei numbers have changed, before flashing, the first imei number ended in 7 - now it ends with 4, the second imei number ended in 9 and now it ends with 7. Also, i now have a MEID number visable which was not there before and a section called android security patch level. Oddly enough im not getting any issues out of play store, im on play store right now and not a single problem regarding authentication. The build number is the same as well. As far as functionality goes, everything seems to be tip top, in fact everything seems to be working better, even unofficial exposed is working well. Only one thing isn't working properly. In phone manager there was a feature in the battery section that darkens the interface for everything to save power and prolong battery. That doesn't seem to be working anymore. In App - Permissions, the permissions is greyed out and it says no permissions requested.. Any thoughts or explenations guys??
Trying to flash another orginal stock rom
I bought a Mate 9 Pro, China Version (LON-AL00C00) want to install Mate 9 Pro, Asia Version (LON-L29C636) software on it. All explanations about Mate 9 Pro is for models which have SD Card. My Mate 9 Pro with dual sims and not containing a SD Card enrty.
I succesfully unlocked the bootloader, installed TWRP but couldn't flash LON-L29C636 stock software. Because TWRP don't see update.zip file. Not only update.zip, any files I downloaded or copied before. When I put a OGT TWRP suddenly exits and phone restarts.:crying:
As you see I can't flash a zip file and ofcourse superuser zip file to root as well. I'm stuck in this triangle. Please give me a hand guys.
I can't root my phone. Because I can't view and locate any file of my phone. When I plug a ogt cable twrp exits and phone restarts. 6GB-128GB Dual Sim version
---------- Post added at 11:48 AM ---------- Previous post was at 11:47 AM ----------
Seems I am the only one who is looking for something about Mate 9 Pro
CrisperNeO said:
This thread applies to Huawei Mate 9 Pro only (model LON*, as M9Pro below). For Mate 9 (model MAH*) please go to the corresponding forum.
-----
Disclaimer:
I won't be responsible for bricked phone. Proceed with your own risk, make sure you know what you are doing.
This thread can be seen as a guide if your phone has exactly the same model and build version as mine. Otherwise please consider it as a description of my experiences for unlocking, flashing and rooting the phone.
SUPPORTED DEVICES:
LON-L29
LON-AL00
-----
As a start, this phone is great and I feel that it doesn’t need to be unlocked and rooted for a stable and long lasting daily use. However, unlock and root is almost a religion if you use Android phones
As a piece of info, big thanks to @raimondomartire, there is a thread for unlock, flash TWRP and root in the Mate 9 forum https://forum.xda-developers.com/mate-9/development/recovery-huawei-mate-9-pro-unofficial-t3546976, which is however according to my experience not totally applicable for the M9Pro anymore. There are also several other threads on the Mate 9 forum. Many things can be shared between both phones, but not always. Be careful about what you are doing!
-----
General info and attentions:
-My phone is M9Pro LON-AL00 (All net version from Chinese Mainland); LON-L29 (International version) should also work.
-This thread applies for build LON-AL00C00B213. Can be also applicable for similar builds, but I couldn’t test. Please report.
-None of the current builds of TWRP (up to 3.1.0) can decrypt data partition by default, which means you could only format the data partition in TWRP in order to access it in recovery (for backup to and install from internal storage etc.). But after formatting, you have to flash Huawei’s special stock data back to data partition (/data/hw_init), otherwise several functions of Huawei ROM won’t work. Refer to this (https://forum.xda-developers.com/showpost.php?p=71302827&postcount=627) or this (https://forum.xda-developers.com/showpost.php?p=72497328&postcount=204). Thanks to @gm007 and @ante0
-There are several root methods which handles encrypted or decrypted data partition. I didn’t format the data partition, i.e. data is still encrypted. If you want to format the data partition, please refer to this thread: https://forum.xda-developers.com/mate-9/how-to/guide-how-to-root-mate-9-decrypt-data-t3569986. Thanks to @eddmecha
-If you need stock ROM, refer to useful links below. Use Huawei Update Extractor to extract the individual partitions from the ROM: https://forum.xda-developers.com/showthread.php?t=2433454
-----
Unlock bootloader:
There is enough info in the internet about unlocking M9Pro’s bootloader. Just a few points to mention:
-Generally, you can follow the steps in @raimondomartire thread (https://forum.xda-developers.com/mate-9/development/recovery-huawei-mate-9-pro-unofficial-t3546976). But unlike he describes in his thread, there is no OEM Unlock options in the developer options anymore. Just use ADB to unlock.
-FRP unlock is not required!
-Huawei enables now a 14-day limitation, where you can officially get the bootloader unlock code 14 days after you first activate your Huawei ID on your phone and have logged in using your Huawei ID 14 CONSECUTIVE days.
-To go around this limitation, you can use dc-unlocker to get the bootloader code immediately. Google yourself
-----
Flash TWRP:
-Still, you can follow the steps in @raimondomartire thread (https://forum.xda-developers.com/mate-9/development/recovery-huawei-mate-9-pro-unofficial-t3546976).
-The image from this thread is 3.0.3, which has some bugs built in, especially when flashing SuperSU.
-You could use TWRP 3.1.0-1 from https://forum.xda-developers.com/mate-9/development/recovery-unofficial-twrp-huawei-mate-9-t3515617, but this one seems to have problem to be recognized as ADB device in recovery.
-There is a version 3.0.2 for Mate 9, which seems to have problem mounting USB-OTG.
-If your data partition is encrypted, you can only use ADB sideload or USB-OTG to install anything.
-If you want to do data wipe in TWRP, you have to flash Huawei’s special stock data back to data partition. See above general info and attentions.
-----
Root:
Firstly, thanks to @ante0 for explaining different flags in the root methods: https://forum.xda-developers.com/showpost.php?p=72504501&postcount=210. Some more discussions between us are also around this post.
I also tried several other root tools on the market (mobilego, vroot, YoRoot, OneClickRoot, iRoot etc.), NONE of them works.
As mentioned, there are different root methods around for unlocking M9Pro, depending on if you want to format your data partition. For me, I didn’t format, and SuperSU works for me. And the mate_9_pro_root.zip from @raimondomartire thread didn’t work for me.
I followed the steps below:
1.Get TWRP 3.1.0-1 (https://forum.xda-developers.com/mate-9/development/recovery-unofficial-twrp-huawei-mate-9-t3515617)
2.Disable fingerprint ID (I think it’s probably optional, but have read somewhere that fingerprint stops working after flashing root).
3.Flash stock boot image for B213D (in download section). I think it’s optional too, but if you have tried other methods before, you can do this step to make sure your boot is stock and clean
4.Flash TWRP 3.1.0-1
5.Flash SuperSU-v2.79-MATE9-init.d_support_no_decrypt-signed.zip (in download section) via USB-OTG (in TWRP the device is not recognized as an ADB device, hence no “ADB sideload”). Thanks to @ante0 for building this zip!
6.Reboot – phone will reboot itself twice and SuperSU.apk will be installed automatically
7.You could flash back to 3.0.3, if you want the ADB sideload function.
-----
Download:
-TWRP 3.0.3-1: https://forum.xda-developers.com/mate-9/development/recovery-huawei-mate-9-pro-unofficial-t3546976
-TWRP 3.1.0-1: https://forum.xda-developers.com/mate-9/development/recovery-unofficial-twrp-huawei-mate-9-t3515617
-SuperSU modified for M9Pro (thanks to @ante0): https://mega.nz/#!bR8D2Bab!bIgMLVmoll9R0GFqoFgkLxULrXlQ2710INt3TNbuI0c
-Boot image from B213D: https://mega.nz/#!LFlGTTZY!AaFq-_quM44YlK_Qdh9PgOjBE3Wtepmyz5OAuo_mabw
-----
Useful links:
-Stock firmware: http://hwmt.ru/oth/HWFF/info/view.php?find_model=lon
-Huawei Update (ROM) Extractor: https://forum.xda-developers.com/showthread.php?t=2433454
Enjoy your Mate!
Click to expand...
Click to collapse
I unlocked bootloader but couldn't root. Anyway I wanted to rebrand my phone to Asia version. Now I'm done but not successful because there is no Google,frp locked, and version is test one.
I can't install twrp because frp lock don't allow it. Also twrp can't read 128 GB internal memory, so I needed to install from pc.
Is there anyway to resolve and install stock Oreo version to my Mate 9 Pro or do you suggest me to resolve it via paid services?
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livevalue said:
I unlocked bootloader but couldn't root. Anyway I wanted to rebrand my phone to Asia version. Now I'm done but not successful because there is no Google,frp locked, and version is test one.
I can't install twrp because frp lock don't allow it. Also twrp can't read 128 GB internal memory, so I needed to install from pc.
Is there anyway to resolve and install stock Oreo version to my Mate 9 Pro or do you suggest me to resolve it via paid services?
PRA-LX1 cihazımdan Tapatalk kullanılarak gönderildi
Click to expand...
Click to collapse
I've installed Oreo to Mate 9 Pro. If you have 128GB edition don't try to install anything from internal storage. That's it.
PRA-LX1 cihazımdan Tapatalk kullanılarak gönderildi
Hi guys, for re-branding there are threads in general Mate 9 forum. I didnt do it and am not planning to do it either...
CrisperNeO said:
Hi guys, for re-branding there are threads in general Mate 9 forum. I didnt do it and am not planning to do it either...
Click to expand...
Click to collapse
Rebranding is easy with HWOTA system if you will keep your phone EMUI 5.0 Nougat. And there is no risk if you make everything clearly.
PRA-LX1 cihazımdan Tapatalk kullanılarak gönderildi
never used Huawei before have a couple of questions
1. Is there anyway to get back to full stock with relock bootaloder in case the device need to go to service center?
(assume unlock bootloader with dc-unlocker not huawei id one)
2. From question 1 what do i need to do or backup before root?
thnak you so much!
44alphabeT said:
never used Huawei before have a couple of questions
1. Is there anyway to get back to full stock with relock bootaloder in case the device need to go to service center?
(assume unlock bootloader with dc-unlocker not huawei id one)
2. From question 1 what do i need to do or backup before root?
thnak you so much!
Click to expand...
Click to collapse
Yes you can always flash stock ROM as factory out, if you are not in Oreo.
And you can root it. It's your own protection to have a backup. I suggest you have, anyway it's up to you. You can loose all your data after root.
Hi, yersterday I used TWRP trying to install a newer firmware and I wiped system partition and now it does not boot because it doesn't have an OS. I was on EMUI 8 (636) trying to update the firmware.
Is there any way to flash a firmware via TWRP or Fastboot on EMUI 8 (i know partition names change on Oreo).
Thanks!

My Huawei Mate SE is bricked after installing zip in TWRP

I just bought a Huawei Mate SE which is a newer phone that looks like the Honor 7x. I've noticed whenever I search for Huawei Mate Se custom roms, recoveries, and even stock roms I only find Mate 9 stuff and find my self desperate with no support of root, and anything else. I found an article called "How to : Huawei Mate SE Root & TWRP Recovery" , and I successfully unlocked the bootloader, and I successfully installed twrp. The text on the bottom I didn't see which said to install the dm-verity thing. I ran into the problem where there were all these folders were displaying weird text in the main partitions, so instead of installing the version they told me, which was the no-verity-opt-encrypt-4.1.zip, I installed the latest which was the no-verity-opt-encrypt-6.0.zip version, which soft bricked. So I thought I could fix this by installing a custom ROM. But there were none, so I tried to install cm13 honor 7x rom and It didn't work. I tried installing the correct version after the rom. So even now if I tried to revert the old boot img it still wouldn't work because of the rom. However, since my bootloader is unlocked there is definitely a way I can fix all this. But the problem is their is not any Huawei Mate SE roms anywhere. I need a stock rom for my phone (possisbly a custom rom), or some fix. I can access my recovery, and the bootloader, but not anything else. My model is the BND-L34, pls help.
I did the same thing. Got it working
Put this in twrp back up folder on external SD card. Restored both files then factory reset in twrp. It worked for me every thing works. unzipped with Windows pc
Can't post links. Post [EMUI 5.1] OTA Firmwares and Unbrick Phone method. In Huawei 7x thread post#139 by AlexxC might be easter to search his posts. I have mate se in us on tmo/MetroPCS I flashed the correct 4.1 and still got soft brick. That article cost me couple hours. rooted with honor 7x method. Guess it really is the same phone with extra gig of ram. To AlexxC thanks, you the man
bradass402 said:
Put this in twrp back up folder on external SD card. Restored both files then factory reset in twrp. It worked for me every thing works. unzipped with Windows pc
Can't post links. Post [EMUI 5.1] OTA Firmwares and Unbrick Phone method. In Huawei 7x thread post#139 by AlexxC might be easter to search his posts. I have mate se in us on tmo/MetroPCS I flashed the correct 4.1 and still got soft brick. That article cost me couple hours. rooted with honor 7x method. Guess it really is the same phone with extra gig of ram. To AlexxC thanks, you the man
Click to expand...
Click to collapse
I tried the manual method of unbricking with multi touch and the phone booted, but it is a black screen, and I only see the home, back and tabs buttons. So after i figured out to use the backup that you sent me and it still wouldn't boot.
Are you getting errors in twrp restore you have to mount the partitions that your restoring boot system data etc
bradass402 said:
Are you getting errors in twrp restore you have to mount the partitions that your restoring boot system data etc
Click to expand...
Click to collapse
i did what you said in the pm, and got the cust.img flashed, but now it bootloops to the recovery
tomjfmu said:
i did what you said in the pm, and got the cust.img flashed, but now it bootloops to the recovery
Click to expand...
Click to collapse
Why dont you boot into huawei eRecovery? It downloads the firmware and recovery and recovers your phone.

downgrade from 10 to 9?

hello, my miA3 was in V10.3.17.0.PFQEUXM, and i had some troubles with it after trying to root with magisk because of a wrong boot.img, and i lost wifi.
since I couldn't find a V10.3.17.0.boot.img to flash and get back wifi, i try to find some escape plan and finally i succeed to install twrp and then official V11.0.8.0 , but i would like to go back to V10.3.15.0 and root it ( or 10.3.17.0 if someone have the good boot.img ), is it possible?
Just download fastboot rom and you are good to go
arjo656 said:
hello, my miA3 was in V10.3.17.0.PFQEUXM, and i had some troubles with it after trying to root with magisk because of a wrong boot.img, and i lost wifi.
since I couldn't find a V10.3.17.0.boot.img to flash and get back wifi, i try to find some escape plan and finally i succeed to install twrp and then official V11.0.8.0 , but i would like to go back to V10.3.15.0 and root it ( or 10.3.17.0 if someone have the good boot.img ), is it possible?
Click to expand...
Click to collapse
If you want to keep your sensors and DRM working, follow this guide:
https://forum.xda-developers.com/showpost.php?p=82110807&postcount=224
amnher said:
Just download fastboot rom and you are good to go
Click to expand...
Click to collapse
ok,do you have a link with DL and tuto step by step?
_mysiak_ said:
If you want to keep your sensors and DRM working, follow this guide:
https://forum.xda-developers.com/showpost.php?p=82110807&postcount=224
Click to expand...
Click to collapse
thanks (again ) mysiak, the steps are clear but there is no link for dl any of the rom he's talking
edit : i downloaded a rom 10.3.15.0 here https://forum.xda-developers.com/mi-a3/how-to/rom-xiaomi-mi-a3-laurelsprout-t3962489, but when i double click on flash_all.bat nothing happends
arjo656 said:
thanks (again ) mysiak, the steps are clear but there is no link for dl any of the rom he's talking
edit : i downloaded a rom 10.3.15.0 here https://forum.xda-developers.com/mi-a3/how-to/rom-xiaomi-mi-a3-laurelsprout-t3962489, but when i double click on flash_all.bat nothing happends
Click to expand...
Click to collapse
Run the script from terminal window, it will show you an error message why it fails.
arjo656 said:
hello, my miA3 was in V10.3.17.0.PFQEUXM, and i had some troubles with it after trying to root with magisk because of a wrong boot.img, and i lost wifi.
since I couldn't find a V10.3.17.0.boot.img to flash and get back wifi, i try to find some escape plan and finally i succeed to install twrp and then official V11.0.8.0 , but i would like to go back to V10.3.15.0 and root it ( or 10.3.17.0 if someone have the good boot.img ), is it possible?
Click to expand...
Click to collapse
Guys, I did the update for android 10 in the second wave.
after trying to return to android 9 my device got stuck resetting the "android one" home screen, as there was no solution i put the "pixel" rom for mi a3.
Today as a test again I tried to flash the rom stock 9 and everything went back to normal as it was before, with everything working.
I believe that after installing "PIXEL" something made it back to normal.
alexjmachado said:
Guys, I did the update for android 10 in the second wave.
after trying to return to android 9 my device got stuck resetting the "android one" home screen, as there was no solution i put the "pixel" rom for mi a3.
Today as a test again I tried to flash the rom stock 9 and everything went back to normal as it was before, with everything working.
I believe that after installing "PIXEL" something made it back to normal.
Click to expand...
Click to collapse
yes , that's what sapper morton explained in a other post:
" I received Android 10 as an OTA 29th February, and a couple of days later I updated to v11.0.8.0 (locked bootloader); but I didn't enjoy it overall, so I did install Magisk, after a couple of days, I downgraded to Pie (March firmware); I lost my sensors, did try a couple of things, none of them solved the issue.
I knew from the beginning I could have flashed persist.img, but then again, I would've lost my DRM Keys (Widevine), thus I updated to Android 10 Stock (recovery firmware) to regain my sensors.
After a little search I read that downgrading from a custom Android 10 ROM (PX in my case) solves the issue on Pie, I tried and the sensors started working again on Android 9 Stock, without losing Widevine L1, since persist partition was intact. "
So my steps to solve the issue was as it follows:
1• Flashed Android 10 Stock (sensors working) [Recovery]
2• Flashed Android 9 Stock (sensors not working) [Fastboot]
3• Flashed Android 10 custom (sensors working) [Recovery]
4• Flashed Android 9 (sensors working) [Fastboot]
hello all
is there any download link to "3• Flashed Android 10 custom (sensors working) [Recovery]" or do you recommend a specific custom rom ?
I want to do the downgrade right

Huawei P20 lite ane-lx2 BRICKED

I need help urgently. I have a p20 lite ane-lx2 that had an update and got bricked. I tried the dload methot on my SD card but no luck keeps on telling me fail to do update. I have tried all the stuff on this forum with no sucsess.. Please please help my battery also does not charge the phone anymore since this happen.. I have read some stuff around that it can be done by adb tool. But I'm a noob.. I please need help I have taken it in to suppliers but they say they can't do anything.. I can boot up into download mode but goed to 5 persent then reboots.. Can go to recovery mode byt phone and frp is locked. And if I boot normally it just gets stuck to system apdate fail and error codes.. Please help
This answer have 2 solutions
1 st solution - using SP flash tool
download android oreo, ANE-L01C432B144 – 8.0.0.144 – Europe
https://www.getdroidtips.com/huawei-p20-lite-b144-oreo-update/
flash stock ROM via SP flash tool
https://flashingguide.com/huawei/how-to-flash-huawei-p20-lite/
---------------------------------------------------------------------------
2 nd solution - using fastboot (adb, terminal, manual, harder, but less likely can go wrong if you follow steps)
https://unofficialtwrp.com/huawei-p20-lite-root-twrp/
just skip step of rooting.
but you need unlocked bootloader:
https://unofficialtwrp.com/how-to-unlock-bootloader-on-huawei-phone-2019-working/
when you flash twrp you need to flash stock ROM via TWRP recovery
download android oreo, ANE-L01C432B144 – 8.0.0.144 – Europe
https://www.getdroidtips.com/huawei-p20-lite-b144-oreo-update/
open TWRP recovery and transfer downloaded stock ROM in phone and flash via TWRP
https://www.theandroidsoul.com/how-to-install-a-custom-rom-using-twrp-recovery/
and it should do just fine
--------------------
sorry if answer look too hard to understand, just follow instructions on links and my answer how to do it, and it will work

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