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How to downgrade from B952 to GB

89 posts in this topic

Posted

Step 7 is a must. You won't be able to connect to any mobile network if the IMEI is zero. So... restore the original IMEI as soon as you downgrade to GB.

B882 is old and has the low-volume issue on ringtones. I only use this to restore IMEI after the downgrade, so I can upgrade via OTA to the latest GB rom.

If the phone still starts, try to flash middle package, then b892, then B895. Assuming that you did a IMEI restore before that :)

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Posted

I restarted everything from Step 1. When reached at Step 8, i did it OTA (using 3G). Now, at B895, my wireless is wrong. It keeps trying to connect: Obtaining IP address ... Rembered, Disabled, Obtaining IP address etc. It keeps on doing this with several acces points, so it's something wrong witch the phone's software. I remeber it worked at B882 or B888. I tried rebooting device using volume key up + power button and it still does the same. I saw that someone had the same problem in page 1/2, but you said that was probably because he restore anything from my previous rom.

Any advice?... please

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Posted

@ghini: try to do a factory reset from recovery mode and it should work. I tested the ICS2GB downgrade procedure on more than 20 phones and none of them had any issues after the downgrade.

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Posted (edited)

Since you messed with your IMEI you should check that your MAC address is OK:

System settings > Wireless & networks > Wifi > Menu key > Advanced > MAC address

What does this say?

This thread might be of interest if it's wrong:

http://www.modaco.com/topic/364094-question-about-mac-address/

Edited by dalyer
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Posted (edited)

Downgrade to these rom


U8815V100R001C00B887

U8815V100R001C00B888

U8815V100R001C00B889

U8815V100R001C00B890

U8815V100R001C00B891

U8815V100R001C00B892

U8815V100R001C00B893

U8815V100R001C00B894

U8815V100R001C00B895

U8815V100R001C00B896

U8815V100R001C00B897

U8815V100R001C00B898

U8815V100R001C00B899

U8815V100R001C00B900

U8815V100R001C02B927

U8815V100R001C02B928

U8815V100R001C02B929

U8815V100R001C02B930

U8815V100R001C02B931

U8815V100R001C02B932

U8815V100R001C02B933

U8815V100R001C02B934

U8815V100R001C02B936

U8815V100R001C02B937

U8815V100R001C02B947

U8815V100R001C02B949

U8815V100R001C02B952

U8815V100R001C86B929

U8815V100R001C00B935

U8815V100R001C00B936

U8815V100R001C00B937

U8815V100R001C00B938

U8815V100R001C00B939

U8815V100R001C00B940

U8815V100R001C00B941

U8815V100R001C00B942

U8815V100R001C00B943

U8815V100R001C00B944

U8815V100R001C00B945

U8815V100R001C00B946

U8815V100R001C00B947

U8815V100R001C00B948

U8815V100R001C00B949

U8815V100R001C00B950

U8815V100R001C00B951

U8815V100R001C00B952

U8815V100R001C00B953

U8815V100R001C00B954

U8815V100R001C00B955

U8815V100R001C00B956

U8815V100R001C00B957

U8815V100R001C00B958

U8815V100R001C00B959

U8815V100R001C00B960

U8815V100R001C00B961

U8815V100R001C00B962

U8815V100R001C00B963

U8815V100R001C00B964

U8815V100R001C00B965

U8815V100R001C00B966

U8815V100R001C00B967

U8815V100R001C00B968

U8815V100R001C00B969

U8815V100R001C00B970

U8815V100R001C00B971

U8815V100R001C00B972

U8815V100R001C00B973

U8815V100R001C00B974

U8815V100R001C00B975

U8815V100R001C00B976

U8815V100R001C00B977

U8815V100R001C00B978

U8815V100R001C00B979

U8815V100R001C00B980

U8815V100R001C00B981

U8815V100R001C00B982

U8815V100R001C00B983

U8815V100R001C00B984

U8815V100R001C00B985

U8815V100R001C00B986

U8815V100R001C00B987

U8815V100R001C00B988

U8815V100R001C00B989

U8815V100R001C00B990

U8815V100R001C00B991

U8815V100R001C00B992

U8815V100R001C00B993

U8815V100R001C00B994

U8815V100R001C00B995

U8815V100R001C00B996

U8815V100R001C00B997

U8815V100R001C00B998

U8815V100R001C00B999

1.install a small update.app - http://ulozto.cz/xEU8sSt7/update-app

2. install such update.app B895

Without removing the IMEI

Edited by kubikmar
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Posted

I can't even get past stage 2 and 3.

My phone is already rooted, but I don't understand what to do with the 5irom toolkit. I have backed up my IMEI. Got a folder on my desktop, but I don't understand about extracting it.

I can't find imei-0.rar... All I have is fonts, framework, imei backup and recovery. All folders empty except imei backup which has the numbers 5, 10 and 11 in there.

I'm so confused.

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Posted

Why are you doing this the hard way?

Just flash downgrade zip, do all the wipes and flash B985. I downgraded my baseband in two.minutes.

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Posted

I haven't got a clue what I'm doing.

Could you explain how exactly please?

Like how you flash etc? thanks.

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Posted (edited)

Just follow this topic

http://www.modaco.com/index.php?/topic/361310-Downgrade-&-upgrade-from-recovery

This is the easy way

1. Download downgrade b985 zip

2. From CWM install downgrade zip.

Reboot to recovery again.

3. Do the full wipes

Wipe data/factory reset

Wipe cache partion

Wipe dalvik cache

From mount and storage format system

Format sdcard1 (internal storage) and sdcard2 (external)

4. Mount storage from cwm and copy B985 (slim/superslim whatever) to sdcard.

5. Install and reboot (screen will flicker two times at huawei logo, dont worry)

Edited by Dovahpig
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Posted

Just follow this topic

http://www.modaco.co...e-from-recovery

This is the easy way

1. Download downgrade b985 zip

2. From CWM install downgrade zip.

Reboot to recovery again.

3. Do the full wipes

Wipe data/factory reset

Wipe cache partion

Wipe dalvik cache

From mount and storage format system

Format sdcard1 (internal storage) and sdcard2 (external)

4. Mount storage from cwm and copy B985 (slim/superslim whatever) to sdcard.

5. Install and reboot (screen will flicker two times at huawei logo, dont worry)

That's fine if you have CWM installed but on Stock 952 you can't install CWM

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Posted

That's fine if you have CWM installed but on Stock 952 you can't install CWM

Why not? Can't you follow this tutorial for example?

However if you use that tutorial and intend staying on ICS/JB then don't do their bootloader unlock but instead follow this tutorial:

But if you are ultimately going back to GB and will use the ICS to GB downgrade zip mentioned above (which restores the original GB bootloader) then you can just do the unofficial ICS bootloader unlock if you don't have an official bootloader unlock code.

Hope this helps.

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Posted

and if you don't want/need cwm, then what?

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Posted

and if you don't want/need cwm, then what?

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Posted

Well you could just ignore it once installed if you don't need it.

Or flash a stock ROM update.app to restore the original recovery.

I'm not sure what your point has to do with the earlier poster's problem and the advice that I and others are posting in attempt to help them?! :unsure:

Maybe you have a better way for them to recover their phone and get back to GB?

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Posted

I already posted my solution for downgrading to GB, see the first post.

The purpose of that tutorial is to help an unexperienced user to get back to stock gb (as in "the way the phone was when I bought it") without too muxh hassle. Just a few steps.

No cwm, no custom ROMs, just stock GB.

If you have a better/faster solution for downgrading to stock GB without cwm please post it and you'll get the credits. :)

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Posted

But isn't hacking the IMEI risky - even after it has been restored? I linked to threads that suggest this to be the case earlier.

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Posted (edited)

The transition from B952 to any other rom including GB, only through a small update.app no interference in the IMEI.

1.install a small update.app - http://ulozto.cz/xEU8sSt7/update-app

2.installing any update.app for example B895

Without removing the IMEI!!

Edited by kubikmar
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Posted

IMEI backup/restore isn't more dangerous than CWM backup/restore. Both procedures read/write some memory blocks from/to the phone.

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Posted

Just like to say thank you vhristenco for spending time to create this process - very helpful and I'm now back at GB. I think I hit all the reported problems: no superuser till reboot into recovery, no wifi at B892 if upgrading from B882, can't then just update with B895 without going all the way back to step 3. So I would recommend a few alterations:

 

To the start of step 5 I would add something to the effect of 'Choose either B882 or B895 to flash, note that there have been WiFi issues caused by flashing B882 and then upgrading to B892 via OTA'

 

Change step 6 Windows section from 'launch GingerbreadRoot.exe. When it finishes, your phone will reboot.' to 'launch GingerbreadRoot.exe. When it finishes, remove the battery, wait for 3 seconds, re-insert the battery then power the phone while keeping Volume UP pressed. It will take you to recovery. From recovery, select "Reboot system".' (thanks for the tip vhristenco!) - can't comment on other OSs.

 

Potentially re-edit the 'As some people are having trouble upgrading via OTA to B895' paragraph or at least state that steps 3-7 must be repeated (and step 2 if they deleted their IMEI backup!).

 

I think these edits would capture most of the issues reported and make this a little more straight forward. Thanks again for an excellent post!

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Posted

Houston, we have a problem!

 

Did all steps, everything was ok for two weeks. Today, duriing browsing, the phone freezed. I had to remove the battery and reinstert it to be able to do something. But now the phone doesn't even boot. The Huawei logo appears and freezes. Tried to remove/reinsert battery several times. Volume down + power does nothing. Volume down + volume up + power starts the pink progress bar, but every time it freezes at 1/3. Connecting to computer does nothing either. Now what?...

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Posted

If everything was working fine for two weeks, then I don't think the problem is related to the downgrade.

Try to remove the batter, wait for 2 seconds, then re-insert the battery and press poweron while holding the vol+ button pressed.

This will get you to recovery mode. Once there, restore the device to default settings.

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Posted

It freezes on huawei logo when I do that... kept them both pressed for more than 30 secs

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Posted

Are you absolutely sure that you press the Volume UP button and not Volume DOWN?

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Posted

yes I am... I also tried to change the dload folder with one with another folder. It still gets stuck at some point. So: pink progress bar gets stuck at some point, depending to the version of dload. Anything else trying leads to huawei logo freezed.

I'm thinking about taking it to warranty. Considering the present situation, vodafone could find out that I rooted it?

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Posted

if it's rooted, they will find out.

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