HELP ! LG G3 BOOT VERIFICATION FAIL CAUSE mismatch sig len - G3 Q&A, Help & Troubleshooting

Hello
so i have a big issue / Problem i think
So i had the ROM Installed called Limitless_Full_UX5.0_v10.3_by_Cassoli
But i had a issue where my phone didnt pick up my sim card or Sd card so i tried to flash back to STOCK
But what happend i think is that i accidentaly removed the cable and interupted the Install
So now im not able to boot the phone
im not able to get in download mode
and im not able to get in recovery
Basically my phone is bricked
My phone is getting recognized by my computer as Qualcom 9300 or something like that so i dont know if thats is a good thing or bad thing
I Have already tried to flash with LG FLASHTOOL & boarddiag please help me !

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[Q] cant get past bootloop

I bought this lg e980 all messed up from a friend who had rooted it and none of the google apps worked and I don't think it has any recovery on it bc when I try the combination keys nothing happens it just asks if I want to do a hard reset and when I try to flash one it just give me a dead android guy. I was using freegee and it said my aboot was not compatible with the list or something so I thought If I flashed another one with flashify I would might be able to put a recovery and see if It fixed it but it didn't . im on a bootloop with the lg logo and I get a message saying file battery_charging_complet.png is missing. and im asking if anyone knows how to fix this problem

[help] lg g3 d855 twrp

Okay so today i installed TWRP Recovery and rooted my phone.
Got myself in a bit of trouble now. I get an error when i turn my phone on. And my SD Card got corrupted. Basically I want to ask you guys how to fix all these problem and uninstall twrp recovery.
Ah yeah, I can't use the SD Card on my phone Only on other phones. tried fomatting it from the phone didn't work only on my other phone it worked but on the G3 it still gets recognized as corrupted .
I've looked in a few ways of removing the recovery and they seem really hard and confusing. There's another method that i suspect will work and it's from the "LG Mobile support tool" And when i connect my phone there's an option to "Upgrade Recovery" Wanted to ask you guys if this method will work.
I guess my phone is bricked Rooted with this method http://forum.xda-developers.com/lg-g3/general/root-twrp-marshmallow-d855-30b-t3286268 . I can't get into recovery only if i go with a program and reboot the recovery.
Plesae guys i need help ASAP
Thanks, And i hope there will be an answer soon!

Download mode doesnt work.

Hi guys, im having a big problem over here.I have European d855 g3, 32gb version.When i turn it on phone freezes on lg logo and restarts.I thought it is a soft brick so i tried everything to flash it to stock and fix it with all flash tools , and i had a errror like "MODEL INFORMATION CHECK FAIL"" that is with LG flash tool ,When i try to get into download mode phone stays there a while and just restarts, stock recovery is stuck on logo too.So i thought it was battery and i bought new one.Problem is still here.Then i tried on my friends battery too.Nothing helps. I think it is not a hard brick because it is still giving signals of life. Sorry for my bad English, but i desperately need help! :crying: :crying:

Bootloop after root

hey guys , after unlocking the bootloader i tried to root my g4 H815 with TWRP recovery 2.8.... , the recovery said that it worked , unfortunately after rebooting the device , i got a bootloop , tried to back up using the "Send_Command" interface via cmd because i really need the data , but i keep getting the FAIL message , i can't even flash the stupid device , it indeed starts the flashing process according to download mode , but everything disappers after about 2 seconds , i'm sure i have correct usb drivers , it's like the phone's write protected , anybody please help me
Sisine said:
hey guys , after unlocking the bootloader i tried to root my g4 H815 with TWRP recovery 2.8.... , the recovery said that it worked , unfortunately after rebooting the device , i got a bootloop , tried to back up using the "Send_Command" interface via cmd because i really need the data , but i keep getting the FAIL message , i can't even flash the stupid device , it indeed starts the flashing process according to download mode , but everything disappers after about 2 seconds , i'm sure i have correct usb drivers , it's like the phone's write protected , anybody please help me
Click to expand...
Click to collapse
Are you able to be in the download mode for some time? Try to use DLM backup using lglaf to backup all your partitions.
tulen_kobi said:
Are you able to be in the download mode for some time? Try to use DLM backup using lglaf to backup all your partitions.
Click to expand...
Click to collapse
I have acces to download mode of course , but for some reason it's not possible to acces phone memory , as i can't even flash a firmware , i don't know what's wrong , first i thought the problem was due to drivers , but i realized it's not , i'm done trying to backup my data , i just wanna flash the stupid phone
Sisine said:
hey guys , after unlocking the bootloader i tried to root my g4 H815 with TWRP recovery 2.8.... , the recovery said that it worked , unfortunately after rebooting the device , i got a bootloop , tried to back up using the "Send_Command" interface via cmd because i really need the data , but i keep getting the FAIL message , i can't even flash the stupid device , it indeed starts the flashing process according to download mode , but everything disappers after about 2 seconds , i'm sure i have correct usb drivers , it's like the phone's write protected , anybody please help me
Click to expand...
Click to collapse
I would find the stock firmware that you where on and try to flash lgup or flash tool and start again you will lose data but device will be working. And remember to always backup before hand.
First of all thanks a lot as your method perfectly worked , i just have another question out of curiosity if you don't mind , altough LGUP did work of course , i recently noticed that if you don't already have the Google account already registered on the device , and precisely on Lollipop and above , there's absolutely no way you would boot up your phone , i wonder if there's a way to bypass that Google Verification thing !
and just for reference , LG UP doesn't entirely flash the device , it just .... , you know , like just replacing the old firmware without deleting the data , LG FLASH TOOL 2014 doesn't work either , it doesn't even start the flashing process regardless of the firmware , so it's not an option .

LG G3 Cat.6 Bootloop and unknown device in Download Mode

Hi guys,
Please bear with me as I'm new to this scene.
My LG G3 Cat.6 (F460L) is currently stuck in bootloop, can't enter recovery mode as well but it can go through download mode but my PC won't recognize it (tried different usb cables and tried it on another PC, still no luck). I made an error when I was trying to flash twrp into recovery but accidentally flashed it to boot (I was quite unsure about what I did but I think I flashed a wrong version of twrp for recovery and tried to reflash the right version but accidentally flashed it to boot, if that made sense). I was able to get into the factory wipe screen and after pressing yes it goes right into bootloop again. Was also able to get into another screen with turn on, turn off and cancel options but I'm not sure what it does because it's all in korean. My PC can't recognize my device right before this happened so I think that explains why it also can't recognize it while in download mode. I saw something about Qualcomm stuff but I'm unsure as to how it is done (the shortpin part) and i don't think my PC would even recognize it as it can't even recognize my device in the first place (faulty micro usb port I guess). Any fix that you guys can think of? Thank you very much!

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