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[GUIDE] Change to ANY G300/U8815/U8818 ROM via Boot loader version bypass [HACK]

231 posts in this topic

Posted (edited) · Report post

Please TRY this method 1st the u8815 downgrade upgrade tool zip - this MAY allow the upgrade downgrade of roms

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

post-60082-0-22836700-1341400193_thumb.j

post-60082-0-62208400-1341400208_thumb.j

post-60082-0-98907700-1341400228_thumb.j

Edited by Gary_J_Wright
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Posted · Report post

Great work. I can see you becoming popular with a few people around here! :)

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Posted · Report post

not my work just stumbled my way thru and figured how it works ..... I thought twice I had bricked my G300 but no it survived

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Posted · Report post

nice :)

i wonder if the method could be refined or something of the sort. :)

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Posted (edited) · Report post

nice :)

i wonder if the method could be refined or something of the sort. :)

hoping Paul can - will do this - its also really needs to be confirmed on another phone - although Ive used it 4 or 5 times now

and just to add Ive just received a phone call on this phone, so it works!

Edited by Gary_J_Wright
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Posted · Report post

Waiting for it... ;)

B894 is not upgradable..

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Posted · Report post

Bit pointless making a thread without posting the method. People know well already that anything they do is at their own risk, the people who upgraded to B894, for instance. :P

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Posted · Report post

Bit pointless making a thread without posting the method. People know well already that anything they do is at their own risk, the people who upgraded to B894, for instance. :P

can see Gary's point in asking permission before posting the method; as not to be liable for bricking people phone if it goes tits up.

also to see if Paul can maybe help in making easier or less likely to brink

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Posted · Report post

great news just need to know if you can restore imei

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Posted · Report post

can see Gary's point in asking permission before posting the method; as not to be liable for bricking people phone if it goes tits up.

also to see if Paul can maybe help in making easier or less likely to brink

No one is liable anyway?

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Posted · Report post

No one is liable anyway?

well...you know what some people are like. they'll point the blame at someone else even tho they pulled the trigger; seems to be the general culture of society now days imo.

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Posted · Report post

well...you know what some people are like. they'll point the blame at someone else even tho they pulled the trigger; seems to be the general culture of society now days imo.

They can blame and they will anyway. Nothing changes that.

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Posted · Report post

They can blame and they will anyway. Nothing changes that.

think Gary just needs to remember to use big bold text etc for the disclaimer.

Look forward to seeing the method....wont try it myself....as well....i'll brick my phone lol.

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Posted · Report post

great news just need to know if you can restore imei

only if you have made a previous backup....

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Posted · Report post

guide , apk and files sent to paul to check over - improve ammend etc (if @ all)

this only works on a working rooted phone, if you have bricked or lost imei it will not help

off out till teatime now, will update later

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Posted · Report post

I backed up my rom b883 yoigo to serve that copy ClockworkMod

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Posted · Report post

5lromtoolbox, did you use this to back up your imei files Gary? It appears to work on the G300 to backup imei but I haven't had to use it for restore thankfully.

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Posted · Report post

anyone want to be a tester? @ own risk - you need a G300 with b894 or b895 that has tried and failed to update to ICS, still have your receipt and enough balls to return if YOU brick it!

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Posted · Report post

anyone want to be a tester? @ own risk - you need a G300 with b894 or b895 that has tried and failed to update to ICS, still have your receipt and enough balls to return if YOU brick it!

I'm in.

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Posted · Report post

needs to be done to restore this tell me how to do

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Posted · Report post

best of luck who ever take on the challenge....do report back :)

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Posted · Report post

Good luck, gents.

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Posted · Report post

I'm in.

instructions pm'd to Dazzozo to read through, if he understands I will send him the downgrade.zip to try ( I'm sure he will - i'm doubting my guide! )

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Posted · Report post

ok :)

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Posted · Report post

5lromtoolbox, did you use this to back up your imei files Gary? It appears to work on the G300 to backup imei but I haven't had to use it for restore thankfully.

5iromtoolbox.apk works fine on my g300 to backup and restore imei, but as always i cant say if will for you!

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