[GUIDE]Downgrade the undowngradeable phones
- Thread starter berni987654321
- Start date
Yeah, i have USB debugging enabled too.
Where are this drivers? I have the LG driver not the OMAP.
But the PC didn't ask me the driver.
I must restart in download mode and then run the script for reboot the phone in fast boot?
I remember that OMAP drivers is for download mode...
i didn't see that message, all i've seen is in the screenshot. Would you pls help me flash it via team viewer tonight?
3. then go into fastboot mode with wkparts omap tool
Someone can help me with step 3?
These are my steps:
1) Turn on the phone
2) Connect to PC via USB Cable (with Android Debug activated)
3) In Omap Tool omap4boot-for_optimus-v1.11 i run the script start_fastboot.bat
Right? But he displays waiting for OMAP 44xx device..
Someone can help me with step 3?
These are my steps:
1) Turn on the phone
2) Connect to PC via USB Cable (with Android Debug activated)
3) In Omap Tool omap4boot-for_optimus-v1.11 i run the script start_fastboot.bat
Right? But he displays waiting for OMAP 44xx device..
Turn off your phone, take out the battery, connect your USB-cable while the console displays "waiting for OMAP 44xx device", this way you phone will be detected if the drivers etc. are installed correctly.
Your phone will eventually display something like fastboot 0.5
The PC recognize a device OMAP 4430 for 1 sec and then disappears. After 1 sec recognized again and then disappeare.
I can't! He is active only for 1 sec. He disconnect/connect/disconnect/connect/...
But is normal that it appears only for 1 sec? :
In the device manager which are the name after driver installation?
------------------------------
Please remove USB cable
and wait until LG Logo on
then reconnent USB cable again
------------------------------
fastboot devices (y/N) ? and press <ENTER>
Now i have this, I have inserted the battery and when LG logo on i connect the cable, but after he boots normally in CM10! :/ Now?
Ok, now works! I have a screen with fastboot v0.5
THANKS!!!!!!!!
Please remove USB cable
and wait until LG Logo on
then reconnent USB cable again
------------------------------
fastboot devices (y/N) ? and press <ENTER>
Now i have this, I have inserted the battery and when LG logo on i connect the cable, but after he boots normally in CM10! :/ Now?
Ok, now works! I have a screen with fastboot v0.5
THANKS!!!!!!!!
Last edited:
Ok, LG Logo grayed appear but when i type fastboot flash u-boot u-boot.img it say <waitinf for device> and... nothing. What i've done it wrong ?
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42Hi 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 else5i'm very happy too that I uploaded the files elseway I would be self stucked on ics33
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!2
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
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