Attend XDA's Second Annual Developer Conference, XDA:DevCon 2014!
5,734,036 Members 51,997 Now Online
XDA Developers Android and Mobile Development Forum

[GUIDE]Downgrade the undowngradeable phones

Tip us?
 
berni987654321
Old
(Last edited by berni987654321; 14th March 2013 at 08:19 PM.)
#1  
berni987654321's Avatar
Recognized Contributor - OP
Thanks Meter 1474
Posts: 667
Join Date: Feb 2012
Location: Erding
Default [GUIDE]Downgrade the undowngradeable phones

Hi guys,

I'm very prowed to say that I succesfully downgraded my phone.

I nearly tried everything and nothing worked, always blackscreen
when booting with the old gb bootloader.

The probleme is that some p920s need a special
x-loader and u-boot file which nobody backed up. I just
got them and now restoring to gb will work for everyone.

Use this files too if you've downgraded from su760 ics port
and your having problems with network.

How to make your phone work on gb again:

1. Download this and extract:
mmcblk0p1-4

2. flash complere bootv21e when you are on ics

3. then go into fastboot mode with wkparks omap tool

4. open cmd and go into the directory with the downloaded files

5. type:
fastboot flash u-boot u-boot.img
fastboot flash x-loader x-loader.img
fastboot reboot

6. fix your imei

hope it works for you for me worked nothing else
My WorkPac-man ROM device maintainer for p920, p970 and crespo-- contact me if you want me to port it to your phone
Press that fuc***g Thanks Button ;D
The Following 44 Users Say Thank You to berni987654321 For This Useful Post: [ Click to Expand ]
 
menasamir
Old
#2  
Junior Member
Thanks Meter 0
Posts: 20
Join Date: Jun 2011
Location: cairo
WOW its working Thank u very much
 
berni987654321
Old
#3  
berni987654321's Avatar
Recognized Contributor - OP
Thanks Meter 1474
Posts: 667
Join Date: Feb 2012
Location: Erding
Quote:
Originally Posted by menasamir View Post
WOW its working Thank u very much
no problem
My WorkPac-man ROM device maintainer for p920, p970 and crespo-- contact me if you want me to port it to your phone
Press that fuc***g Thanks Button ;D
The Following 3 Users Say Thank You to berni987654321 For This Useful Post: [ Click to Expand ]
 
kidkoala_uk
Old
(Last edited by kidkoala_uk; 9th December 2012 at 12:49 AM.)
#4  
kidkoala_uk's Avatar
Senior Member
Thanks Meter 334
Posts: 682
Join Date: May 2007
Location: Greenock
Quote:
Originally Posted by berni987654321 View Post
Hi guys,

I'm very prowed to say that I succesfully downgraded my phone.

I nearly tried everything and nothing worked, always blackscreen
with booting with the old gb bootloader.

Half a hour I read xbsals post the one whiches phones don't boot
after flashing the gb bootloaders would need a special bin which nobody has
because nobody made a backup. But then I remembered my post in samnos thread about downgrading from wrong flashed ics leaks with my first 4 partitions attached.

Do how to make your phone work on gb again:

1. Download this and extract:
mmcblk0p1-4

2. flash complere bootv21e when you are on ics

3. then go into fastboot mode with wkparts omap tool

4. open cmd and go into the directory with the downloaded files

5. type fastboot flash u-boot u-boot.img
fastboot flash x-loader x-loader.img
fastboot flash nv1 nv1.img
fastboot flash nv2 nv2.img
fastboot reboot

6. fix your imei

hope it works for you for me worked nothing else
berni987654321 I have to thank you I have been using your u-boot.img and x-loader.imgfor a number of weeks it's helped me out on numerous occasions btw I have flashed only u-boot.img and x-loader.img and not nv1 and nv2 and not had to restore IMEI.

using this -P920 Backup Of mmcblk0p1-4 - http://forum.xda-developers.com/atta...8&d=1347623892 (Thanks berni)

This is how I fixed my downgrade problems thanks to you http://forum.xda-developers.com/show...&postcount=909
 
berni987654321
Old
#5  
berni987654321's Avatar
Recognized Contributor - OP
Thanks Meter 1474
Posts: 667
Join Date: Feb 2012
Location: Erding
i'm very happy too that I uploaded the files elseway I would be self stucked on ics
My WorkPac-man ROM device maintainer for p920, p970 and crespo-- contact me if you want me to port it to your phone
Press that fuc***g Thanks Button ;D
The Following 5 Users Say Thank You to berni987654321 For This Useful Post: [ Click to Expand ]
 
kidkoala_uk
Old
#6  
kidkoala_uk's Avatar
Senior Member
Thanks Meter 334
Posts: 682
Join Date: May 2007
Location: Greenock
Quote:
Originally Posted by berni987654321 View Post
i'm very happy too that I uploaded the files elseway I would be self stucked on ics
Likewise mate I stumbled across it after xbsall bootv21e did not work for me then I remembered samno's partition test which in turn led me to your files, I'm so grateful you backed these up.

---------- Post added at 01:15 AM ---------- Previous post was at 12:59 AM ----------

have you managed to get CM10 booting yet?
The Following User Says Thank You to kidkoala_uk For This Useful Post: [ Click to Expand ]
 
berni987654321
Old
#7  
berni987654321's Avatar
Recognized Contributor - OP
Thanks Meter 1474
Posts: 667
Join Date: Feb 2012
Location: Erding
Quote:
Originally Posted by kidkoala_uk View Post
Likewise mate I stumbled across it after xbsall bootv21e did not work for me then I remembered samno's partition test which in turn led me to your files, I'm so grateful you backed these up.

---------- Post added at 01:15 AM ---------- Previous post was at 12:59 AM ----------

have you managed to get CM10 booting yet?
no I flashed bootv21e my backup files and then 21a kdz but it doesn't boot yet, I'm now playing around with my gpt table cause I have probs with internal memory and mounting some partitions in recovery
My WorkPac-man ROM device maintainer for p920, p970 and crespo-- contact me if you want me to port it to your phone
Press that fuc***g Thanks Button ;D
The Following 2 Users Say Thank You to berni987654321 For This Useful Post: [ Click to Expand ]
 
kidkoala_uk
Old
(Last edited by kidkoala_uk; 9th December 2012 at 01:32 AM.)
#8  
kidkoala_uk's Avatar
Senior Member
Thanks Meter 334
Posts: 682
Join Date: May 2007
Location: Greenock
Quote:
Originally Posted by berni987654321 View Post
no I flashed bootv21e my backup files and then 21a kdz but it doesn't boot yet, I'm now playing around with my gpt table cause I have probs with internal memory and mounting some partitions in recovery
I had the same problem with internal memory, Booted into recovery and factoryreset/data/nvram wipe fixed it for me.
 
falafelipe
Old
#9  
Member
Thanks Meter 4
Posts: 29
Join Date: Feb 2011
Location: São Paulo
Thank you berni987654321
It works!

Now I'm sticking to GB until CM10 gets stable.
 
kidkoala_uk
Old
#10  
kidkoala_uk's Avatar
Senior Member
Thanks Meter 334
Posts: 682
Join Date: May 2007
Location: Greenock
Should be a sticky imo given the amount of users unable to downgrade from ICS.

Thread Tools
Display Modes