Please TRY this method 1st the u8815 downgrade upgrade tool zip - this MAY allow the upgrade downgrade of roms
http://www.modaco.co...m-hauwei-found/
2nd Method if above fails
*** DISCLAIMER IF PHONE BREAKS YOU WILL HAVE TO RETURN TO SERVICE ***
This is a boot loader version check bypass
This is ONLY to be used to UPDATE if Official HUAWEI UPDATE.APP FAILS
i.e B894 B895 > B926, B927
B882 B885 B886 B88x? PLEASE TRY HUAWEI OFFICIAL UPDATE 1ST
It's the only known way to Downgrade ROMS
There are Two types of ICS Modified ROM versions those that have ICS basebands / firmware, B926,B927 based they will come as a zip
and some like cm9 and ligux are ICS Modified ROM versions made to run on GB basebands / firmware again a zip
WE DO NOT USE THEM HERE
USE only the OFFICIAL Huawei UPDATE.APP
The original update.app is ALWAYS official ICS we cant alter the update.app, This is B926/7 based with ICS basebands / firmware
Because I have applied Original ICS 4.0.3 I now permantly have ICS BootLoader
It changes Bootloader I.D not Bootloader to allow change between Roms
So Now I must use this method everytime to allow Change between Roms
via update.app method until a newer booloader version is released
*** This method can and will kill phone if done wrong ***
it will also set IMEI to zero so a backup needed of your IMEI number
****..... DO NOT PROCEED TILL YOU ARE 110% SURE YOU HAVE A ORIGINAL IMEI BACKUP .....****
You must restore ORIGINAL backup of IMEI AFTER OFFICIAL HUAWEI ROM is flashed
You MUST know how to Root ALL ROMS from B882 to B92x ICS 4.0.x
if you don't understand English or fully understand
please ask before you try this
Dazzozo modified version of my guide https://docs.google....QHNo/edit?pli=1
I only translated the Guide
it's the Chinese downgrade method with English text conversion
DAZZOZO Tested and updated the Guide
I can confirmed I have used both a B926 IMEI backup AND a B895 IMEI backup to downgrade to B882
Attached Files
Edited by Gary_J_Wright, 16 July 2012 - 08:12 PM.







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