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[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

WOW its working Thank u very much

menasamir said:
WOW its working Thank u very much
Click to expand...
Click to collapse
no problem

berni987654321 said:
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
Click to expand...
Click to collapse
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/showpost.php?p=34622060&postcount=909

i'm very happy too that I uploaded the files elseway I would be self stucked on ics

berni987654321 said:
i'm very happy too that I uploaded the files elseway I would be self stucked on ics
Click to expand...
Click to collapse
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. :highfive:
---------- Post added at 01:15 AM ---------- Previous post was at 12:59 AM ----------
have you managed to get CM10 booting yet?

kidkoala_uk said:
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. :highfive:
---------- Post added at 01:15 AM ---------- Previous post was at 12:59 AM ----------
have you managed to get CM10 booting yet?
Click to expand...
Click to collapse
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

berni987654321 said:
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
Click to expand...
Click to collapse
I had the same problem with internal memory, Booted into recovery and factoryreset/data/nvram wipe fixed it for me.

Thank you berni987654321
It works!
Now I'm sticking to GB until CM10 gets stable.

Should be a sticky imo given the amount of users unable to downgrade from ICS.

berni987654321 said:
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
Click to expand...
Click to collapse
is the problem you having has to do with your sdcard reading as damage when switch back to ginerbread from ics?

lordboo03 said:
is the problem you having has to do with your sdcard reading as damage when switch back to ginerbread from ics?
Click to expand...
Click to collapse
yes

lordboo03 said:
is the problem you having has to do with your sdcard reading as damage when switch back to ginerbread from ics?
Click to expand...
Click to collapse
factory reset from recovery should fix this.

kidkoala_uk said:
factory reset from recovery should fix this.
Click to expand...
Click to collapse
i tried that still didn't work

lordboo03 said:
i tried that still didn't work
Click to expand...
Click to collapse
Ok I found that flashing the latest KDZ for my provider when wipes did not work fixed this using recovery method from official LGUpdateTool.
---------- Post added at 01:54 AM ---------- Previous post was at 01:52 AM ----------
lordboo03 said:
i tried that still didn't work
Click to expand...
Click to collapse
Stock recovery or CWM recovery?
---------- Post added at 01:57 AM ---------- Previous post was at 01:54 AM ----------
berni987654321 said:
yes
Click to expand...
Click to collapse
this can be fixed

kidkoala_uk said:
Ok I found that flashing the latest KDZ for my provider when wipes did not work fixed this using recovery method from official LGUpdateTool.
---------- Post added at 01:54 AM ---------- Previous post was at 01:52 AM ----------
Stock recovery or CWM recovery?
---------- Post added at 01:57 AM ---------- Previous post was at 01:54 AM ----------
this can be fixed
Click to expand...
Click to collapse
will try this now and report back
---------- Post added at 09:11 PM ---------- Previous post was at 08:58 PM ----------
kidkoala_uk said:
Ok I found that flashing the latest KDZ for my provider when wipes did not work fixed this using recovery method from official LGUpdateTool.
---------- Post added at 01:54 AM ---------- Previous post was at 01:52 AM ----------
Stock recovery or CWM recovery?
---------- Post added at 01:57 AM ---------- Previous post was at 01:54 AM ----------
this can be fixed
Click to expand...
Click to collapse
cwm recovery going to try stock recovery now
---------- Post added at 09:37 PM ---------- Previous post was at 09:11 PM ----------
no dice i couldn't get it fixed either way have you had any luck berni987654321?

I will try it as soon as i can
Sent from my LG-SU760 using xda app-developers app

Hi guys!
I try this procedure but no success... it stucks on
< waiting for device >
I have an O3D P920H, want to get back on GB...
Actually i can only have the ported ICS, but with no bluetooth, no wifi, no calls, sluggish system, phone heating abnormal...
Thanks for the help!

Guys for the damaged sd card can you format the card cause I got that error and it fixed it
Sent from my LG-P925 using xda app-developers app

SHAMAN.BR said:
Hi guys!
I try this procedure but no success... it stucks on
< waiting for device >
Click to expand...
Click to collapse
Hey guys, good news!!
ITS ALIVEEEE!!!!
Everything its OK!! Finally i could get back to GB with no problems, everything fine, no flaws, no mess...
The message "< waiting for device >" was because i was not on FAST BOOT, but on RECOVERY BOOT:
Just to clarify to someone who needs:
RECOVERY BOOT = no battery, volume UP press, connect USB, put battery (two arrows, sw upgrade)
FAST BOOT = no battery, volume DOWN press, connect USB, put battery (LG logo grayed)
After get into v21e, put usb in debug mode and flash your preferred KDZ or bin/FLS and be happy!
Thanks Berni... You are my hero!

recovery help

just did a clean install v20d via lgmdp and then rooted it, thus loosing all the custom recovery (CR)
now here the problem arises...
installed ROM manager and found that it isn't showing the CR for new baseband (BB), just shows for the old one
installed goo manager and found that it still isn't compatible with our device
i found a file "twrp-thunderg-2.0.0alpha1.img" on internet while searching for device compatibility
now what should I do to install custom recovery?
all i have is .img files for both clockwork and twrp. I don't trust twrp coz they still aren't showing official status for our device
update -
i flashed recovery via lgmdp tool
but still, whats with the recovery mess?

Not sure. Possibly not supported anymore.
You can also use shinobisofts recovery flash tool.
I had done same as you and used it to flash cwm.

savagephoenix said:
Not sure. Possibly not supported anymore.
You can also use shinobisofts recovery flash tool.
I had done same as you and used it to flash cwm.
Click to expand...
Click to collapse
He figured out he could also flash a recovery with LGMDP.
---------- Post added at 11:46 PM ---------- Previous post was at 11:41 PM ----------
van_helsing_80 said:
update -
i flashed recovery via lgmdp tool
but still, whats with the recovery mess?
Click to expand...
Click to collapse
The recovery is a mechanism to repair or restore the devices OS. It is also utilized to install ROMs and updates.

sorry, what I meant was regarding the incompatibilities with the recovery. That was kind of you to explain what recovery is.

[Q] rooted- can't backup rom

hello all, I'm a noobie. I'd very much appreciate any help... I want to backup my rom . no custom rom is installed, yet.
I'm rooted. have trwp on sprint samsung s5. build number kot49h.g900pvpu1ane5 .
I boot manually to recovery. the green android drops dead with a (!).
the choices are:
reboot device now
apply update from ADB
apply update from external storage
wipe data/factory reset
wipe cach partition
apply update from cache
no option for backing up. any guidance would be helpful. thanks,
hal

That sounds like stock recovery. You need to get a custom recovery on there. You said you have twrp, how did you try to install it?

metalfan78 said:
That sounds like stock recovery. You need to get a custom recovery on there. You said you have twrp, how did you try to install it?
Click to expand...
Click to collapse
,
Thanks for responding. I used TWRP manager root when I tried to install twrp recovery. But I never actually booted into twrp.
I have philz_touch_6.41.6-klte
Will it work, and if so, how do I install it?

Have you ever used Odin? That's the best way.
---------- Post added at 04:25 PM ---------- Previous post was at 04:25 PM ----------
Philz has been the most reliable for backup and restore.
---------- Post added at 04:26 PM ---------- Previous post was at 04:25 PM ----------
http://forum.xda-developers.com/showthread.php?t=2737724
Root Sprint S5....Step-by-Step

metalfan78 said:
Have you ever used Odin? That's the best way.
---------- Post added at 04:25 PM ---------- Previous post was at 04:25 PM ----------
Philz has been the most reliable for backup and restore.
---------- Post added at 04:26 PM ---------- Previous post was at 04:25 PM ----------
http://forum.xda-developers.com/showthread.php?t=2737724
Root Sprint S5....Step-by-Step
Click to expand...
Click to collapse
here's what I did to get to where I was when I started the thread:
1. followed instructions in the qbking video that's mentioned in the step-by-step root thread here http://forum.xda-developers.com/show....php?t=2737724
2. that method uses odin. it seems to have worked. I verified root using root checker basic.
3. installed TWRP manager root.
4. could not boot into recovery using twrp manager or manually. could not back up to ext sd card from twrp mangr. . applied nextapp kitkat sd card fix.
5. using titanium root, backed up apps and data to external sd. no problem.
6. changed ext storage in twrp manager to ext sd. still won't back up rom to ext sd. tried "live backup" with changed storage location to ext sd. nope, the backup went into internal storage.
I am still rooted. can I switch from twrp to phiz? how would I do that? thanks for any help.

I never use 'manager' apps, I don't trust them. You can switch recoveries anytime you want to. I would use Odin since you can't get to recovery. Do you have the recovery tar file for Odin?
---------- Post added at 07:46 AM ---------- Previous post was at 07:45 AM ----------
http://forum.xda-developers.com/showthread.php?t=2783571
[RECOVERY][CWM][ODIN] Custom Recovery Repository (SM-G900P)

following the qbking video, I rooted with Odin using CF-Auto-Root-kltespr-kltespr-smg900p.tar.md5
I'm not sure that answers your question. if not, please clarify, and I'll try again

That doesn't install your recovery. Download Philz from the link I posted.

metalfan78 said:
That doesn't install your recovery. Download Philz from the link I posted.
Click to expand...
Click to collapse
it worked. I booted into recovery, and am waiting for my first backup to finish.
thanks very much for your help and patience.

Right on man, glad I could help

[Q] E8 brick

Hello. I have e8 version with single sim bought in China. I have to reflash the mobile phone because of the firmware in it with only English and Chinese. First I unlocked the bootloader and put TWRP. Then I reflashed the mobile with Oweida version 1.1.0. Firmware asked me standard questions, said that everything is in order and sent the mobile to reboot. After reboot I got a brick, not the reflashed mobile. The phone does not respond to button presses, it is not visible when connected to a computer. Steady HTC saver is on. My question is the following - is there any way to make it alive? Thank you.

I got Sprint E8 model and also bricked. Originally I thought I messed up with system/recovery so it will boot loop to fastboot screen all the time. However, after flash original RUU (either RUU tool or fastboot command method), it still boot to fastboot screen directly. Anybody have any suggestion or can probably help to resolve this issue? I believe my system/recovery has recovered, only I'm not able to boot to the OS normally.
Thanks a bunch!

If you can flash TWRP recovery and ask friend that have clean TWRP Backup you can restore again.
---------- Post added at 03:48 PM ---------- Previous post was at 03:47 PM ----------
http://forum.xda-developers.com/showthread.php?p=56451353

ian.anindya said:
If you can flash TWRP recovery and ask friend that have clean TWRP Backup you can restore again.
---------- Post added at 03:48 PM ---------- Previous post was at 03:47 PM ----------
http://forum.xda-developers.com/showthread.php?p=56451353
Click to expand...
Click to collapse
Thanks ian.anindya. I can flash TWRP but I don't think I can find anyone for its restore data.. Sigh..

Please do nandroid Backup or TWRP Backup before you do modification on your phone. This should be standard procedure to everyone.
Have you do wipe cache after update your rom? Sometime wipe cache could solve the problem.
Also, you can try contact pm with friend here that bring sprint model and favor to make clean Backup to share with you.

ian.anindya said:
Please do nandroid Backup or TWRP Backup before you do modification on your phone. This should be standard procedure to everyone.
Have you do wipe cache after update your rom? Sometime wipe cache could solve the problem.
Also, you can try contact pm with friend here that bring sprint model and favor to make clean Backup to share with you.
Click to expand...
Click to collapse
Yes I have done wipe cache after update. It still loops to fastboot when reboot. Will contact PM to see if anyone can help.
Thanks for your help.

completly unroot

Hi! My phone is general mobile discovery I have rooted my phone by a chaines program . how can I complitly unroot my phone and restore evrything to it's orginal form
note: didn't changed kernal or rom
Thanks.

delbrin93 said:
Hi! My phone is general mobile discovery I have rooted my phone by a chaines program . how can I complitly unroot my phone and restore evrything to it's orginal form
note: didn't changed kernal or rom
Thanks.
Click to expand...
Click to collapse
You can flash a new rom which is un-rooted, like stable version of miui
And maybe you can delete the su in system/xbin or system/bin
Hope i can help you^^
---------- Post added at 09:53 AM ---------- Previous post was at 09:52 AM ----------
also, you can use superoneclick to unroot (need computer)
link : http://forum.xda-developers.com/showthread.php?t=803682