[Mate 8 General] OmarDahy:
hello guys

i success for fixed my phone and back OS again

First I want to say "thank you my brother " [MENTION=2875350]franzyroy[/MENTION] "

he help me a lot

now i want share My Experience about this problem

my problem was i format my OS by TWRP and field to back

or install Build B580 and field to install B200 and B321

and B560 ever time i get field.

so i get some help from my brother franzyroy

this is way i try to fixed this problem

frist u need to this files :

1- Build B560 update.app

2- build B200 update.app

3- file for rollback from B560 to B200

* HUAWEI_Mate_8_Rollback_Package_NXT-L29_From Android7.0 EMUI5.0 to Android6.0 EMUI4.0_C185B500

https://xdaforums.com/mate-8/general/guide-how-to-downgrade-mate-8-emui-5-to-t3515202

4- SRKToolHuawei-Lod-Chong-V2.0-20161002

https://xdaforums.com/mate-8/development/tool-srk-tool-huawei-t3369797

5- HuaweiUpdateExtractor_0.9.9.5

https://xdaforums.com/showthread.php?t=2433454

6- SD Card

7- TWRP v.3.0.2 (u can find here)

https://xdaforums.com/mate-8/general/how-to-install-nxt-l09c605b560-official-t3540637

now you have all files u need

**notes: copy "update.app" Build B560 to SD Card on folder dload and keep this file now

soon we will need to him and copy file "update_data_full_hw_meafnaf.zip" to on SD Card

1- open HuaweiUpdateExtractor_0.9.9.5

and extrict this files from update.app Build B560

* boot.img & recovery.img & system.img

u will see names in update.app

09.recovery.img change name to recovery.img

10.boot.img change name to boot.img

11.system.img change name to system.img

now u have 3 file is boot.img & recovery.img & system.img

copy this files to SRKToolHuawei-Lod-Chong-V2.0-20161002

on file name UNBRICK

final Dir is

SRKToolHuawei-Lod-Chong-V2.0-20161002\UNBRICK\recovery.img

SRKToolHuawei-Lod-Chong-V2.0-20161002\UNBRICK\boot.img

SRKToolHuawei-Lod-Chong-V2.0-20161002\UNBRICK\system.img

open your phone on fastboot mod and connect to ur PC

now open SRKToolHuawei-Lod-Chong-V2.0-20161002.exe

from menu chose " 7. Utility "

and from next menu chuse " 14. FASTBOOT BOOT,RECOVERY,SYSTEM "

now tools will install all img on folder "UNBRICK"

after this u will press "up + down + power" to flash and install file

on folder dload**

back agian to factboot and flash TWRP and after success reboot to

recovery mode (TWRP)

now install file "update_data_full_hw_meafnaf.zip"

after finish from this reboot to system

now if u goto setting >> about phone u will see build not ur build dont worry

now delete file update.app from ur SD CARD\dload

now we will make down grad from B560 to B200

copy file update.app (for downgrad) 81MB

to dload on SD Card and

now power off u phone

When the phone is powered off, press and hold the volume up, volume down, and power

now ur phone will be Build B500

now delete file update.app from SD Card and copy file

update.app Build B200 to dload and power off u phone

When the phone is powered off, press and hold the volume up, volume down, and power

now u will install Build B200

now u can update ur phone from ORIGINAL OTA from B200 to B560

and after some time will appear to u new update To B580 and u will success

to get this update too

final thanks you bro " [MENTION=2875350]franzyroy[/MENTION] "

and sorry about my lang (English not very good)

thanks to all too :)