[Mate 8 General] Samavb:
How to bring back Huawei Mate 8 to working condition

Hello,

I am sorry to hear about your phone. I have faced similar problems with my phone before and I got it back. Using that experience, I will do my best to get your phone back to working condition with your cooperation and patience.

Current condition of your phone based on what you mentioned

1) Last firmware you had was L29C432B560

2) Unlocked bootloader, TWRP

3) Erecovery fails, installing through TWRP fails

Based on what you have written, there are few options that you can try.

Before you choose any of the options below, you need Stock B560 (https://mega.nz/#F!8cgjRDzR!HPKr8jqtINycfANSzlRd0w)

Option 1

( safe option )

Dload method - using Rollback package for L29 model

even if you know how to do dload, I will still mention the points

1) Download the rollback package (https://mega.nz/#!9FgF3BgY!06-_2m4r0EohTxa6gjx00LoXnKI6ygtDhvM4sBwwm5Q) and extract the update.app

2) Make a folder on SD card and name it dload

3) Put the update.app of rollback package in the dload folder

4) Since you are not able to go inside the firmware or use project menu - just use the three finger rule - how ?

switch off the phone - press volume up , volume down , power button together

It should start installing the firmware

If everything goes well - you will see C900BXXX in build number.

Then you have to do dload method again with firmware L29C432B192 update.app

This method may or may not work. Why? because of Twrp . For dload to work - It should have stock recovery for best results.

So you can try this and see if it works. If this doesn't work, not a problem - you can try option 2

Option 2

(Risky method)

1) Download L29C432B560 zip files ( you will have 2 files - 1st one - update.zip and there will be one more zip file) stock rom

2) extract both the zip files to separate folders

3) Download Huawei Update extractor software (https://mega.nz/#!QUojHSIa!SCZn2zd-bNdNseyCrs9xIAm4OgXtDiJ7ToCJ3LzKYF8)

4) This software doesn't require any installation. Just download and extract it to folder and double click on the application

5) Browse and point it to first update.app from first zip file of B560 firmware

5) Extract boot.img & recovery.img

6) Put this boot.img & recovery.img in SRK tools folder

Now we have to flash these 2 files in adb.

1) Switch off the phone

2) press and hold volume down and then connect to computer or charger

3) It should go to fastboot mode.

4) Now open SRK tools

5) Type 000 - you will get command prompt inside SRK tools

6) Now type this below command in SRK tools command prompt

fastboot flash recovery recovery.img

fastboot flash boot boot.img

Press Enter

7) After you have entered those two commands, unplug your phone from computer and restart.

If everything goes well, you should be able to boot into your phone.

If this doesn't work too, then you can try option 3

Option 3

(Risky method)

In this option we are going to flash 3 files in adb

1) Open Huawei Update extractor

2) Browse and point to update.app of 1st zip file

3) Extract boot.img, recovery. img & system.img

4) Put all the three files in SRK tools folder.

5) Now type the following commands one after the other

fastboot flash recovery recovery.img

fastboot flash boot boot.img

fastboot flash system system.img

6) Once you are done with all the commands, unplug your phone and restart.

7) If everything goes well you should be able to go inside your L29C432B560

This is only to recover your phone. Firmware is not complete. If you have any problems after running all these commands. just do factory reset. You will be able to boot into stock recovery because you flashed it in the above steps. So you will be able to do factory reset.

Then you can go back L29C432B192 and then do system update to B560 - this is for clean install. After updating to B560 you will get system update again to B581 this time you will not face problems. It will update smoothly. Once you reach this point I will tell you how to get rooted properly.

Personally, I would ask you to choose Option 3 because it will work as you are flashing all the important files stock recovery , system and boot. But the choice is yours. I can only mention the steps and guide you. It is your call on what you want to do and how you want to proceed.

Please do not deviate from the above steps. I have tried these steps on my phone and many others. I was able to get back all of them to proper working condition.. Your phone will come back too. Relax and follow these steps. And please make a note of every step you are doing while doing it.

Let me know your progress.

:good::good::good::good::good::good::good::good: