Phone doesn't work with any custom ROM's - Optimus One, P500, V Q&A, Help & Troubleshooting

My phone is with android 2.2 stock rom, rooted and with flashed recovery cwm 5.0.2, but when i tried to install any custom ROM's IMEI number is unkown and no have GSM signal. I sucessful reinstall stock rom with kdz updater, but can't to use any custom roms. Any possible solutions ?

Old baseband fix

When I try to update baseband it say this - You cannot download this image without its header file. I tried with v10 and v20 versions.

Related

[Q] stock rom v21a

Hi all.
Please help.
i have v21a baseband with custom rom (thiaiz03D). I want to flash the stock rom v21a. Is it possible to find stock rom in zip format. I think is more easy to flash it via cwm.
Only if someone made a nandroid backup before they installed or flashed anything if not then kdz flash method will get you to stock
sent from my acidhazard thrill

[Q] Roms and Basebands, signal problems - especially promethius custom rom...

Hi,
There's something I just don't get it.
I have an latin america p920h that was running Stock GB v20a.
I've flashed promethius rom and kernel, but it made my signal go away and I got no IMEI under settings/phone info
My question is, is it possible to flash custom roms with different firmware versions? In this particular case flashing an v20f when my original rom was v20a without having signal problems?
Tried v21 and v20 promethius with no luck, no signal no IMEI.
I've heard that flashing stock KDZ could restore my signal, but it also means no custom rom...
(BTW lost my backup, used it once and made my phone brick... so using it is not an option lol)
flash 20p kdz and then install promethius or any other rom based on v21e

Stock Everything Stock

I don't understand these directions from the FAQ:
"Q. How to get back to stock? I need to give my phone to warranty services how do I revert to official LG rom?
A. Check this thread. It is the v10b 2.2 stock rom as a flashable zip package. If you can't access the recovery, then see if the firmware for your country is available here or use this tool. Download the firmware and use the KDZ tool to flash. You will find instructions to use the KDZ tool on this thread. For a picture guide, check this thread.
Also for official GB lovers, see this and this. It is a v20g rom in flashable zip package. Or if you'd rather flash v20c/g roms from LGMDP, the links for that can be found in this thread.
If you are on Optimus V, see http://forum.xda-developers.com/show....php?t=1025911
If you are on the Optimus T, see this post. Uses the KDZ method.
Q. How do I restore the stock recovery?
A. Download the original recovery zip file from here and flash it. (Yes, you can flash a recovery from within recovery itself)"
I have LG P500 from USA T-Mobile. I'm on V20 Baseband.
1)Is kdz the only way to go back to stock?
2)Which way is the safer and better way to get back to stock?
3)How (full instructions) to get back to stock rom for USA T-Mobile?
4)How (full instructions) to get back to stock recovery for USA T-Mobile?
yes you can flash a recovery from recovery, if it is a flashable zip
you need to stick with your phone not other variants of LG p500, O-1(Europe), O-T or O-V, dunno what is the T-mobile USA version, but is it written inside your phone under battery
1) KDZ is for flashing software in your phone, but beware, if you are unexperienced you may brick your phone for good, but you can try it, DO NOT PULL OUT BATTERY OR DO SOMETHING WHILE KDZ IS NOT FINISHED FLASHING PHONE OR YOU WILL HARDBRICK IT (but, I do not think someone at service will notice that, after a hardbrick, it just went dead and nothing else, nobody knows nothing)
2)if you do not know what are you doing, nothing is safe, anyway, as I mentioned, a hardbrick is a hardbrick and if you still have warranty, you are lucky
3)http://forum.xda-developers.com/showthread.php?t=1824618 search there
4) LG P500 doesn't have stock recovery(just bootloader)
if you do not know what to flash try to find a T-mobile rom image (MAKE A REQUEST-someone will post it), and first time when flashing a recovery is to backup original rom for what will come after
LGMDP will work like this, it upgrades rom when you have an older version, so try to flash an older custom rom, find an Froyo 2.2 and flash it as any custom rom, boot, conect your phone to PC, that means that you have LG USB drivers installed, start LGMDP and w8 to detect your phone, after that goto options & help, select country, carrier, phone, w8 to detect latest update, start update
in case that your phone is not detected, boot into recovery, goto mounts and mount USB, that will make LGMDP detect your phone, start updating
androiddownloader said:
I don't understand these directions from the FAQ:
"Q. How to get back to stock? I need to give my phone to warranty services how do I revert to official LG rom?
A. Check this thread. It is the v10b 2.2 stock rom as a flashable zip package. If you can't access the recovery, then see if the firmware for your country is available here or use this tool. Download the firmware and use the KDZ tool to flash. You will find instructions to use the KDZ tool on this thread. For a picture guide, check this thread.
Also for official GB lovers, see this and this. It is a v20g rom in flashable zip package. Or if you'd rather flash v20c/g roms from LGMDP, the links for that can be found in this thread.
If you are on Optimus V, see http://forum.xda-developers.com/show....php?t=1025911
If you are on the Optimus T, see this post. Uses the KDZ method.
Q. How do I restore the stock recovery?
A. Download the original recovery zip file from here and flash it. (Yes, you can flash a recovery from within recovery itself)"
I have LG P500 from USA T-Mobile. I'm on V20 Baseband.
1)Is kdz the only way to go back to stock?
2)Which way is the safer and better way to get back to stock?
3)How (full instructions) to get back to stock rom for USA T-Mobile?
4)How (full instructions) to get back to stock recovery for USA T-Mobile?
Click to expand...
Click to collapse
KDZ is generally discouraged . However if you can find a Nandroid back up of GB , then that would be the safest way . I went back to stock froyo with the help of this thread - http://forum.xda-developers.com/showthread.php?t=1955354
sarans1987 said:
KDZ is generally discouraged . However if you can find a Nandroid back up of GB , then that would be the safest way . I went back to stock froyo with the help of this thread - http://forum.xda-developers.com/showthread.php?t=1955354
Click to expand...
Click to collapse
Thank you, i can just use that other download on the thread if i have the new baseband right? and what about removing cwm? or restoring stock recovery even though there wasnt before
androiddownloader said:
Thank you, i can just use that other download on the thread if i have the new baseband right? and what about removing cwm? or restoring stock recovery even though there wasnt before
Click to expand...
Click to collapse
Your have V20 that is new baseband so any rom from GingerBread onwards is good for you . Stock recovery can be flashed sitting right from custom recovery . Check out this thread for custom recovery and ROM of 2.3.3 - http://forum.xda-developers.com/showthread.php?t=1309744 . If you wanna try lgmdp look at this - http://forum.xda-developers.com/showthread.php?t=1324105

Flashing telco's baseband onto stock firmware

I have a Z3 with stock prerooted firmware and would like to flash my telco's baseband to see if it will fix some issues.
Is this do-able with the flash tool? Is it possible to do this?
Also, are basebands strictly for the version intended?
It's been a while since I last flashed the rom so can't remember the tools.

Anyone else lost LTE completely on 6045O after flashing custom rom?

So I tried out a few of the popular roms for this phone on my 6045O and lost LTE with the CM 13 one and tried going back to stock and LTE didn't come back. Does anyone have a Lollipop Radio Modem backup from stock Lollipop?
You need to either install android 5.1 firmware and backup your modem partition, or download the 5.x modem zip from famewolf for your version and flash it after flashing an mm ROM.
Sent from my 6045O using Tapatalk
Edit you can always use Panasonic switch to restore to lollipop firmware, so do what you want and if you don't like the result, use Panasonic to return fully to lollipop stock including the band 12 modem.
You will basically never want to return to stock mm, since band 12 is off and you won't be able to install twrp to change the modem.

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