LG G4 can wont boot in OS, TWRP bootloop - G4 Q&A, Help & Troubleshooting

Guys please someone help me :crying:
I have a Lg G4 (H815) which has an unlocked bootloader and Astrakos amazing V30 port with his nougat bootloader. I did a factory reset in settings (not within twrp) and now the phone only boots in TWRP recovery. I tried to reinstall the rom but nothing happens. Does someone know how i can completely downgrade from v29a to stock marshmallow? I can not afford tu buy a new phone. Please someone help me? :crying: I would even pay on Paypal if someone can really help me like which kdz and dll i can downgrade and how.

Reflash twrp. It is corrupt

GalaxyS3User2000 said:
Guys please someone help me :crying:
I have a Lg G4 (H815) which has an unlocked bootloader and Astrakos amazing V30 port with his nougat bootloader. I did a factory reset in settings (not within twrp) and now the phone only boots in TWRP recovery. I tried to reinstall the rom but nothing happens. Does someone know how i can completely downgrade from v29a to stock marshmallow? I can not afford tu buy a new phone. Please someone help me? :crying: I would even pay on Paypal if someone can really help me like which kdz and dll i can downgrade and how.
Click to expand...
Click to collapse
Go to the official TWRP thread and install the latest preview flavor for nougat .
Sent from my OnePlus 6T using XDA Labs

Related

LG G4 H815 SEA Stuck on LG Logo Screen

So i decided to unlock my h815sea bootloader, every thing went fine. I was able to flash twrp, flash android 6.0 with root and boot into system. I wanted to install xposed, i downloaded v78-sdk23-arm64.zip. I flash the zip and reboot into system. Now i cant go past lg boot screen. Could someone tell me how i can go into twrp? I am able to go into download mode, but LGUP application shows phone as unknown, can I use lg flashtool to flash android 6.0 kdz? OR am i able to flash android 5.1 kdz since i am able to go into download mode. I backed up everything using twrp and have all the files on my desktop.
nvm. I was able to go into recovery and flash genisys rom for xposed framework. For some reason when i try to flash xposed on a stock mm file, phone goes stuck on lg logo.
blackburry said:
nvm. I was able to go into recovery and flash genisys rom for xposed framework. For some reason when i try to flash xposed on a stock mm file, phone goes stuck on lg logo.
Click to expand...
Click to collapse
When did you unlock your bootloader?
I would love to know the answer to that as well.
reiko09 said:
When did you unlock your bootloader?
Click to expand...
Click to collapse
I was able to get the unlock key when lg accidentally enabled bootloader unlocking for SEA variant on their website. Didn't it use the unlock key until yesterday. Loving MM, so smooth.
blackburry said:
I was able to get the unlock key when lg accidentally enabled bootloader unlocking for SEA variant on their website. Didn't it use the unlock key until yesterday. Loving MM, so smooth.
Click to expand...
Click to collapse
There's a guy (shiboby) that is looking for the unlock.bin files to examine to see if he can figure anything out for them. Doubtful anything will come of it, but you may want to send him yours to see if it would help
hyperfriend said:
There's a guy (shiboby) that is looking for the unlock.bin files to examine to see if he can figure anything out for them. Doubtful anything will come of it, but you may want to send him yours to see if it would help
Click to expand...
Click to collapse
As an owner of a locked H815 SEA, I would greatly appreciate him being sent this file haha. Or perhaps post it in this thread: [Bounty] [allready $2400+] Unofficial bootloader unlock
hyperfriend said:
There's a guy (shiboby) that is looking for the unlock.bin files to examine to see if he can figure anything out for them. Doubtful anything will come of it, but you may want to send him yours to see if it would help
Click to expand...
Click to collapse
Done & Done. Posted the zip on bootloader bounty thread.

LG G4 Bootloop

Hello,
Today my Phone suddenly started to reboot at first it just did a reboot normaly but afterwards it started to reboot again but now I am stcuk in the screen with the lg logo and the bootloader unlocked message I tried to boot into recovery but after I choose to do factory reset so i can boot into twrp, again it only boots to the screen with lg logo and bootloader unlocked message.
I am on Genesys Rom and did not install any Mods
is there anyway for me to fix this?
Please help me
jizang said:
Hello,
Today my Phone suddenly started to reboot at first it just did a reboot normaly but afterwards it started to reboot again but now I am stcuk in the screen with the lg logo and the bootloader unlocked message I tried to boot into recovery but after I choose to do factory reset so i can boot into twrp, again it only boots to the screen with lg logo and bootloader unlocked message.
I am on Genesys Rom and did not install any Mods
is there anyway for me to fix this?
Please help me
Click to expand...
Click to collapse
unlocking the bootloade voids your warranty.. only way is to send it to LG... or used the modded KDZ to disable big cores... in case you ncaat fix it. or get new motherboard..
raptorddd said:
unlocking the bootloade voids your warranty.. only way is to send it to LG... or used the modded KDZ to disable big cores... in case you ncaat fix it. or get new motherboard..
Click to expand...
Click to collapse
So its not software related? Is there anyway to disable the bootloader unlocked message?
jizang said:
So its not software related? Is there anyway to disable the bootloader unlocked message?
Click to expand...
Click to collapse
bootloop not software but hardware... but you could try flashing KDZ using LGUP. ive seen some claim theirs worked after flashinf stock firmware if it continues then hardware but most likely its hardware..
mines is unlockable.. and trying to keep it that way for the same reason... ive seen a post that says it can be relocked...
heres is the post.. i would like to ask you a favor if you try it.. make video of it .. to prove it works..
http://forum.xda-developers.com/tmobile-g4/help/relock-bootloader-h811-t3372970
This is the reason why i swap my G4 H818P to Korean Variant G4. The Bootloop problem. Korean Variant is perfect for me. Strong 4G signal and no more SMS Limits in Marshmallow official update.
Sent from my LG-F500S using Tapatalk

Rooting H815T Marshmallow

Hey all. So basically I recently purchased the H815T Australian optus model. It was initially on Lollipop but updated to MM & I need root so I can restore all my data from my previous device but seems I need to unlock the bootloader. Unfortunately it couldn't be done because the H815T isn't supported on the LG unlocking website. Is there another way to unlock the bootloader or rooting it? Please help guys, I really need to retrieve my data but can't do so till there is a method to root. Or would I have to downgrade to Lollipop & root? I'd immensely appreciate some assistance with this, cheers.
Stevo001457 said:
Hey all. So basically I recently purchased the H815T Australian optus model. It was initially on Lollipop but updated to MM & I need root so I can restore all my data from my previous device but seems I need to unlock the bootloader. Unfortunately it couldn't be done because the H815T isn't supported on the LG unlocking website. Is there another way to unlock the bootloader or rooting it? Please help guys, I really need to retrieve my data but can't do so till there is a method to root. Or would I have to downgrade to Lollipop & root? I'd immensely appreciate some assistance with this, cheers.
Click to expand...
Click to collapse
no bootloader unlock yet....
you need to be on LP.
but... you also need to know if you can downgrade. i for instance cant. there antirollback version you need to find out . if you can..
raptorddd said:
no bootloader unlock yet....
you need to be on LP.
but... you also need to know if you can downgrade. i for instance cant. there antirollback version you need to find out . if you can..
Click to expand...
Click to collapse
Thanks for your help. I really enjoy being on Marshmallow so don't really want to downgrade. Thankfully I got most of my whatsapp messages through google drive backup & most of the other apps did have some form of cloud storage. I'm gonna stick to MM till a rooting method does eventuate.

LG G4 VS986 Root question. 2BA or 13B

Hey guys. I had a VS986 back when it was 13B and all I did was downgrade to stock with LGUP and i flashed a rooted stock room, i remember doing something with chainfire "Flashfire" at the time because there is a locked bootloader issue and a custom recovery is not available..?|
Well now i have a new LG G4 VS986 that is 2BA. Can I root the 2BA or do i need to use the LGUP to downgrade to a specific version (like 13b?). And then what is the rooting procedure? YES, I tried to look it up, but i havent been following development for so long I am out of the loop and so much info from the gate is ALOT to take in.
So can someone PLEASE give me a quick run down of the rooting VS986_2BA procedure, and I can figure it out from there- Im not asking anyone to do the work for me, just alittle help. Or a link that could point me in the correct direction. I just dont want to have a new brick! Thank you!!
If you want to root 2ba you need to unlock the bootloader
https://forum.xda-developers.com/g4/general/unlock-unlock-lg-g4-device-usu-t3760451
Make sure you read the instructions and warnings because the bootloader unlock is permanent!!
Do not flash the baceband packeage you don't need it and your SIM won't be detected after flash
After you do that you should know how to get to fast boot mode and you need to flash this patch boot imge https://drive.google.com/file/d/1GH00BeWsEtKE2Ea34dXLmeMUC4Ts8XEI/view?usp=drivesdk
Here's the command
Fastboot flash boot (filename).img
And that's it all you have to do is install Magisk Manager from the play store
If you need any help please quote me
I thought that the VERIZON varient of the LGG4 had a permanently locked bootloader and was/is impossible to unlock?
robles4242 said:
I thought that the VERIZON varient of the LGG4 had a permanently locked bootloader and was/is impossible to unlock?
Click to expand...
Click to collapse
Not as of March 2018. https://forum.xda-developers.com/g4/general/unlock-unlock-lg-g4-device-usu-t3760451
I did it to my Verizon LG G4 and am now on Marshmallow, rooted by Magisk, and running XPosed. It's not a "double-click, next, next, finish" process. Read the entire OP in that link. And here is my summary of what I did https://forum.xda-developers.com/showpost.php?p=76691955&postcount=1063.
Oh wow that's awesome, I didn't know that was possible. But since you personally confirm it then I'm going to check out those links!
I wish I knew about this a month ago, I just downgraded mine and my girlfriends phones and flashed the rooted 13b system images.
Thanks for the info! ?

Need help Unlocking the FRP lock on G8 ThinQ LM-G820UM

Hello everyone I'm new to this forum but I'm at the end of my ropes. I bought a phone off of eBay it's a great phone but it's FRP locked!! And the last owner does not have the information to unlock it. I tried every YouTube video I possibly get my hands on but no luck.
I even paid somebody in Spain to unlock it through a company but they didn't have the tools to unlock it either. I'm really hoping that someone here in this forum has bypassed the FRP lock on this specific phone.
Here is my specific phone: LG G8 ThinQ LM-G820UM. Someone also told me that I could re flash the ROM, it is a Verizon prepaid phone.
I'll be willing to try that if someone can give me a step by step instructions how to do it and what tool I will need.
Thank you for any help that you can possibly give me.
Thanks
-DaLG8Man
Try from LG Bridge with advanced repair.... Try until it downloads the firmware again. Unplug, plug, restart, reset, install some malware, etc.
My V50 once it downloaded again the first firmware that came. It never asked me for patern and fp after installation.
Did you
Get the frp removed?
i just exploid it if you want i casn help
Inerent said:
Try from LG Bridge with advanced repair.... Try until it downloads the firmware again. Unplug, plug, restart, reset, install some malware, etc.
My V50 once it downloaded again the first firmware that came. It never asked me for patern and fp after installation.
Click to expand...
Click to collapse
do you think you can help me as well im having the same issue. where do i download lg bridge?
help me plz
KaKaSHii1210PR said:
i just exploid it if you want i casn help
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Click to collapse
i need to bypass frp on the lg g8 plz

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