Develop Bugs

Sprint LG G2 LS980 : Get out of stuck bootloop / LG Logo soft brick

If you are stuck in boot loop or you just have the LG logo showing on the screen with green LED then I have one solution for you to try out before giving up on the Great G2.(Works for just LG G2 LS980)
Prerequisite files :
1. TWRP recovery (or CWM)
2. ZV8 radio file ("lgls980_zv8_radi0.zip" google it)
3. Cyanogenmod 11 zip file ( worked for me, any other roms might work may be )
I got myself soft bricked when i flashed a modded camera app file on a custom G3 rom for G2. The phone was booting up but nothing happened after LG logo.
The actions which lead to soft brick:
1. Installation of Kitkat baseband for LS980
2. Inatallation of G3 ported rom
3. Flashing of Moddedcamera app via zip
If you are also ended up in bootloop after similar steps then this method will 99.99% should work for you.
In other cases give it a try as CM11 is very safe rom and also zv8 flash is required to make CM11 to work.
The solution I tried out unsuccessfully were,
1. Clear dalvik /cache (using recovery) and reboot
2. Get into recovery and flash Stock backup (Stock 4.2.2) from TWRP
3. Flash Cyanogenmod Nightly after clearing dalvik, cache, system and data. (NEVER WIPE INTERNAL STORAGE in G2)
4. Flash the Custom G3 ported rom again.
all of this failed and I was still either stuck at LG logo or bootloop and then I realized I had ZV8 radio file on my phone and I thought of giving it a try.
Steps I did and that worked for me:
1. I did full wipe :dalvik+cache+data+system (NO INTERNAL STORAGE)
2. I flashed Cyanogenmod 11
3. Flashed ZV8 radio
4. Reboot and it gave the big CM logo for a minute and booted up nicely.
I think the problem was with flashing of Kitkat baseband (one of the steps in flashing G3 ported rom on G2) it might have messed up something for Cyanogenmod not to work and flashing ZV8 fixed it for CM 11.
Hope this info help some G2 owners and save few G2's from turning into a brick.
Even if this does not work for you there are few ways to go back to "stock firmware" those might help you out.

Can you pls tell if your Sprint LS980 is working with any local GSM with mobile data after flashing CyanogenMod 11 & ZV8 radio?

skybluedream said:
Can you pls tell if your Sprint LS980 is working with any local GSM with mobile data after flashing CyanogenMod 11 & ZV8 radio?
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Click to collapse
i have the same setup i will throw my brothers at&t sim in and see. that will be later this evening. but i believe it might still need to be unlocked

[Q] Lg G pro f240L is stuck at recovery mode

My Lg G pro f240L is stuck in recovery modem when I reboot my LG Optimus G pro f240L it goes to recovery mode auto, and stuck in that mode. Is there any solution please help me Thanks Every one. I am new here

Try flash what ever recovery you're (cwm or twrp) using again from within the recovery.

iamaliiraja said:
My Lg G pro f240L is stuck in recovery modem when I reboot my LG Optimus G pro f240L it goes to recovery mode auto, and stuck in that mode. Is there any solution please help me Thanks Every one. I am new here
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Click to collapse
we need more information: Questions, when did this happend, just booting it normally or after flashing a rom or restoring an image? Also, if you flash/restore, which rom? Many times the roms will work with all Optimus G pro versions but you have to manually load your modem, in this case your modem would be for the F240. You can download your modem (google your modem model you will find it) and copy it to your SD card then flash it
other questions: have you rooted? did you flash CWM or TWRP?
This all assuming this happend after you flashed a rom. If you didnt then you just might have to do a factory wipe/recovery.
Lets us know and we will help :cyclops:

Anyone that's stock in the recovery loop, try flash the recovery and then reinstall the rom and the gapp files first. This is much easier, and it works for me every time. It's much easier than try flashing the OEM ROM with the flashing tool, and then flash the custom ROM again. All you have to do is find the zip file of which ever recovery you're using, loop back to the recovery, flash the recovery zip file, then the custom ROM and the gapp, reboot, vola! You have just fixed the dreaded recovery bootloop error.

[TWRP FAILED!!!] Please help! Cannot boot to recovery now, Stock Recovery Lost! D850

Hello,
My phone has stock Lollipop on LG G3 AT&T D850, and today I tried to install CM12 on my phone.
I used the official TWRP App to install the latest recovery for D850, and after that the phone got stuck at the black screen, with red/blue indicator blinking forever. I can boot to the system normally after pressing VolumnDown+Home, but now my phone is so messed up! I cannot even flash my phone to the stock ROM under Download Mode, because the recovery is broken! I later tried Flashify and different recovery editions, but it is still the same thing.
There is not a good recovery image for LG G3 D850 5.0 so far, at least for me. Please help! Thanks so much!

xw2016 said:
Hello,
My phone has stock Lollipop on LG G3 AT&T D850, and today I tried to install CM12 on my phone.
I used the official TWRP App to install the latest recovery for D850, and after that the phone got stuck at the black screen, with red/blue indicator blinking forever. I can boot to the system normally after pressing VolumnDown+Home, but now my phone is so messed up! I cannot even flash my phone to the stock ROM under Download Mode, because the recovery is broken! I later tried Flashify and different recovery editions, but it is still the same thing.
There is not a good recovery image for LG G3 D850 5.0 so far, at least for me. Please help! Thanks so much!
Click to expand...
Click to collapse
Does it still boot normally?

itsbighead said:
Does it still boot normally?
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Click to collapse
Yes, I can still use the phone. I cannot factory reset or FlashTool reset because the download mode is gone.

Same here. Rooted D855 with one click and tried to flash TWRP with official app from Play Store. Failed and rebooted to recovery. Now I only see blue and red blinking led.... damm...

Did you two flash twrp on stock rooted 5.0? Grats, you have ignored all warnings that were posted in these "how-to-root-5.0" threads.
Download stock recovery.img, flash it (you can do it even via flashify), be happy.

Hi YaDr,
could you specify which recovery.img you mean? possibly with a link?
i have to admit that i was stupid as well :angel:

[SOLVED][Q] Question for LS980 Devs/Experts about Partitions!

When trying to go from d3rp ZVC to UltraPop ZVG, I flashed a "Boot fix" zip by Agimax that flashed a new aboot, boot, laf, modem, and recovery image to be able to flash a ZVG rom without tot back to stock. Then I flashed the ZVG radio, then the ROM. Ended up with LG logo boot loop. It won't boot past that. So, I rebooted to recovery. Recovery works, and I can use adb. I can't flash anything but the ZVG rom, unfortunately. Any other rom I try to flash gives an assert failed error about loki.sh.
Since I have access to adb shell, and can copy files over to the internal storage by way of mtp or adb push.. Would I be able to fix this by copying over the ZVC aboot, boot, laf, modem and recovery (or maybe omit the recovery so I can still get back to TWRP )? Or would this cause and unrecoverable brick?
Also, Download mode isn't an option. No matter what I do, the phone will not enter download mode to tot back to stock.
Basically, looking at this thread for unbricking a real hard-bricked G2, all I really need to do is flash aboot, boot and laf for stock then I should have download mode back, right? I need to know for sure before I end up putting it in a state where a motherboard replacement is the only option.

agentfusion said:
When trying to go from d3rp ZVC to UltraPop ZVG, I flashed a "Boot fix" zip by Agimax that flashed a new aboot, boot, laf, modem, and recovery image to be able to flash a ZVG rom without tot back to stock. Then I flashed the ZVG radio, then the ROM. Ended up with LG logo boot loop. It won't boot past that. So, I rebooted to recovery. Recovery works, and I can use adb. I can't flash anything but the ZVG rom, unfortunately. Any other rom I try to flash gives an assert failed error about loki.sh.
Since I have access to adb shell, and can copy files over to the internal storage by way of mtp or adb push.. Would I be able to fix this by copying over the ZVC aboot, boot, laf, modem and recovery (or maybe omit the recovery so I can still get back to TWRP )? Or would this cause and unrecoverable brick?
Also, Download mode isn't an option. No matter what I do, the phone will not enter download mode to tot back to stock.
Basically, looking at this thread for unbricking a real hard-bricked G2, all I really need to do is flash aboot, boot and laf for stock then I should have download mode back, right? I need to know for sure before I end up putting it in a state where a motherboard replacement is the only option.
Click to expand...
Click to collapse
Since you have adb, push the partitions from the KitKat auto-rec apk for the device you have. What really breaks it is the firmware. And any other ROM you have the wrong partitions loaded to work.

secret.animal said:
Since you have adb, push the partitions from the KitKat auto-rec apk for the device you have. What really breaks it is the firmware. And any other ROM you have the wrong partitions loaded to work.
Click to expand...
Click to collapse
I just grabbed aboot, boot, and laf and copied them and used dd to flash in adb shell (dd if=aboot.img of=/dev/block/platform/msm_sdcc.1/by-name/aboot repeated for each img, changine aboot to boot in the img and /dev path.)
After that i was able to boot into download mode and flash tot back to stock. Unfortunately, something went wrong and i lost my esn,msid,meid dec,etc and my msl is now 000000. No efs backup (thought i backed it up to my pc, but i backed up EVERYTHING else.) So i'm heading to sprint today to see if they can fix it, or if I'll need to play ignorant and use my repair plan for a new one.
Thanks though!

Getting stuck at 'Patching System Image Unconditionally' for hours whenever I flash

Hi I am using a LG G3 F400L whenever I flash a custom rom i get stuck at "Patching System Image Unconditionally"
for hours.
1. CM13 Nightlies
2. CrDroid
Running Stock Kitkat 4.4.2
>Root (via Stump Root)
>Install Super SU
> Flash Custom Recovery Bumped TWRP (via Flashify)
> Install Zip( via TWRP) > got stuck at "Patching System Image Unconditionally"(for hours)
>Phone Heats up and battery drains significantly
> So I pulled the Battery every time this happens
> Put the battery Back and Power On
>LG logo appears stuck on Bootloop
>Tried to use NAND Backup not working it says complete restore Failed
>Whenever i tried to Boot to system it asks me if i want to Boot to System without OS
> So I enter into download mode and flash stock firmware via Flashtool (PC)(TOT File) to get the phone to work
*I always clean flash
Is there no way for me to Flash a Custom Rom?
Is there something wrong with what I am doing?
Thanks in Advance!

do you have backup of modem of lg g3 f400l

[email protected] said:
do you have backup of modem of lg g3 f400l
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Click to collapse
I don't have.
why do i need backup modem?(*sorry for the noob question)

Dyeko said:
I don't have.
why do i need backup modem?(*sorry for the noob question)
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Click to collapse
Because baseband is unknown .I try to flash modem but baseband is still unknown.Can u plz send me modem backup of lg g3 f400s or f400l