Restore v20 to 100% Stock (!!even for bricked devices!!)

[cnjax]

hello is there any available pure stock firmware for LG v20 H910 AT&T?? kindly please help me sir

There are no kdz files for the H910

Sent from my LG-H910 using XDA Labs

 

[tech_infinity]

so my device got messed up. I have 990ds and had rooted using dirtysanta. I was running resurrection remix rom. I flashed the kdz file for my variant but now it is just stuck on LG boot logo and I can't access twrp. Any suggestions?
I've tried a couple of firmwares using LGUP but I'm still stuck on lg boot logo every time.

 

[cnjax]

so my device got messed up. I have 990ds and had rooted using dirtysanta. I was running resurrection remix rom. I flashed the kdz file for my variant but now it is just stuck on LG boot logo and I can't access twrp. Any suggestions?
I've tried a couple of firmwares using LGUP but I'm still stuck on lg boot logo every time.

Los based roms change the partition sizes so you will probably need to do a full wipe and format and then flash the kdz

Sent from my LG-H910 using XDA Labs

 

[kingtm]

so my device got messed up. I have 990ds and had rooted using dirtysanta. I was running resurrection remix rom. I flashed the kdz file for my variant but now it is just stuck on LG boot logo and I can't access twrp. Any suggestions?
I've tried a couple of firmwares using LGUP but I'm still stuck on lg boot logo every time.

Use this method to back to stock - https://forum.xda-developers.com/v20/how-to/guide-lg-v20-to-life-t3827732

Sent from my LM-G710 using Tapatalk

 

[tech_infinity]

Los based roms change the partition sizes so you will probably need to do a full wipe and format and then flash the kdz

Sent from my LG-H910 using XDA Labs

how do I perform a full wipe without twrp or the phone booting up?
EDIT: It booted. Thanks

 

[endleesss]

if the method doesn't work, try this:
1. take out the battery
2. push vol up
3. put in the battery (while holding vol up)
4. plug in usb (while holding vol up)
that worked on VS995

 

[gila2]

Downgraded from Oreo back to Nougat 10c(SEA) for my H990DS. Steps are on point. Thanks OP!

 

[wing_addict_usa]

Anyone know where to find firmware for h918?

 

[shadavis08]

Anyone know where to find firmware for h918?

SuperRom thread @hassaanM has it just remember firmware for nougat and oreo are different.

 

[shadow322]

Anyone know where to find firmware for h918?

https://lg-firmwares.com/downloads-file/15185/H91810u_00_0528.kdz

 

[hec2k]

I need serious help
Tried to downgrade a LG V20 VS995 from 20c to 20b
And now it won’t boot at all
It just vibrates constantly every 2 seconds
Only shows me anything on screen if I plug it in without a battery
No other signs
Not sure if battery is dead
Someone told me to fix boot with jtag but I have no idea how to do that or where to start
If anyone can contact me and help please do so
Whatsapp 3479154327 or Skype datricanfromqueenz
Thanks

---------- Post added at 09:12 PM ---------- Previous post was at 09:12 PM ----------

I need serious help
Tried to downgrade a LG V20 VS995 from 20c to 20b
And now it won’t boot at all
It just vibrates constantly every 2 seconds
Only shows me anything on screen if I plug it in without a battery
No other signs
Not sure if battery is dead
Someone told me to fix boot with jtag but I have no idea how to do that or where to start
If anyone can contact me and help please do so
Whatsapp 3479154327 or Skype datricanfromqueenz
Thanks

 

[jackson019]

I need serious help
Tried to downgrade a LG V20 VS995 from 20c to 20b
And now it won’t boot at all
It just vibrates constantly every 2 seconds
Only shows me anything on screen if I plug it in without a battery
No other signs
Not sure if battery is dead
Someone told me to fix boot with jtag but I have no idea how to do that or where to start
If anyone can contact me and help please do so
Whatsapp 3479154327 or Skype datricanfromqueenz

Well first off, do you remember the battery level when you initiated the downgrade? If it was 50% or higher it's doubtful the battery went bad. Secondly, the next option is to try another battery. If that fails, try to boot to recovery. If that fails, you might have to use the patched LGUP and do a Partition DL flash via download mode. Follow this link and when you get that up and running, select "PARTITION DL", then when the sub menu opens, check "Select All" and make sure all options are checked. Your data will be wiped, but you should be able to boot.

 

[jax0rz]

i've actually been trying to get this to work...

H990N, trying to go back to Nougat from Oreo (Dec 2018 security patch)

i've tried following the steps at the beginning (tried the 4.2 drivers and the 4.1.1 drivers) and also tried a firmware e and h versions, but each time i boot up LGUP as per instructions it says "can't load the model" etc.

I've extracted the dll from firmware e and h and tried both and it doesn't work; antivirus is off.

the best i've gotten is launching LGUP before the usb device connected sound on PC happens, LGUP says "device not connected" and when i press OK i can see that it shows my model and [COM4], however when i click select it goes back to the "can't load model" message.

Is this an issue with the current security update or am i doing something wrong? i got the firmwares from the links at the beginning and extracted the LGUPc files directly from both.

 

[Vortell]

i've actually been trying to get this to work...

H990N, trying to go back to Nougat from Oreo (Dec 2018 security patch)

i've tried following the steps at the beginning (tried the 4.2 drivers and the 4.1.1 drivers) and also tried a firmware e and h versions, but each time i boot up LGUP as per instructions it says "can't load the model" etc.

I've extracted the dll from firmware e and h and tried both and it doesn't work; antivirus is off.

the best i've gotten is launching LGUP before the usb device connected sound on PC happens, LGUP says "device not connected" and when i press OK i can see that it shows my model and [COM4], however when i click select it goes back to the "can't load model" message.

Is this an issue with the current security update or am i doing something wrong? i got the firmwares from the links at the beginning and extracted the LGUPc files directly from both.

Not sure about arb status on H990ds I don't think they incremented it. I would check that first. I think there is dial code for that if on stock. Then for your issue with model not matching there is lg v20 patched lgup. Read how to use it correctly in it's thread. Or look one post above yours for quick info and link. If still having issues flashing correct model the only thing I have read about is flashing another model's kdz then flashing correct kdz after.

 

[jax0rz]

Not sure about arb status on H990ds I don't think they incremented it. I would check that first. I think there is dial code for that if on stock. Then for your issue with model not matching there is lg v20 patched lgup. Read how to use it correctly in it's thread. Or look one post above yours for quick info and link. If still having issues flashing correct model the only thing I have read about is flashing another model's kdz then flashing correct kdz after.

holy crap i'm an idiot... i forgot the 'common' folder entirely for the last two days that i've tried it; it took me until downloading the patched version to realize that i needed to include the \common FOLDER.

anyways, i can confirm that the instructions at the beginning work for an H990N patched with the Dec 2018 security update! the only thing i would add to the instructions is that you can get the DLL file from the same kdz file using the WindowsLGFirmwareExtract tool from here https://forum.xda-developers.com/showthread.php?t=2600575

 

[wanderso]

Using the OP's technique and the appropriate .kdz image, can I reflash an LS997 and make it into a working US996? I'm interested in only non-rooted (stock) ROMs, and I've got the "upgraded" LGUP.

 

[anon389389109]

delete

 

[Dorasamu]

holy crap i'm an idiot... i forgot the 'common' folder entirely for the last two days that i've tried it; it took me until downloading the patched version to realize that i needed to include the \common FOLDER.

anyways, i can confirm that the instructions at the beginning work for an H990N patched with the Dec 2018 security update! the only thing i would add to the instructions is that you can get the DLL file from the same kdz file using the WindowsLGFirmwareExtract tool from here https://forum.xda-developers.com/showthread.php?t=2600575

so were you able to downgrade to nougat?

 

[jax0rz]

so were you able to downgrade to nougat?

yep; still on the nougat i downgraded to as well

 

[mgzavala]

Hello, do I need to re-lock the bootloader to be 100% stock? I want to install the Android 8 ota update, my phone is LG V20 H91810U with Android 7