[US998][STOCK][PIE]LG V30 US998 US99830b_00_0902.KDZ

[phuocloc]

You are probably thinking of Master Reset, to stop the bootlooping. But if you are downgrading from Pie US998 to Oreo US998, there shouldn't be any bootlooping. HOWEVER, if you are crossflashing from another firmware like AT&T H931, Canada H933, Sprint LS998 to US998 Oreo KDA -- yes there will be bootlooping. For those you will need to follow the Frankenstein directions, where you downgrade to US998 Nougat. Run Master Reset to stop the bootlooping. THEN, you can update to early Oreo US999 for bootloader unlock.

everything worked. thank you very much. May I ask for your help once more, how can I get the modem.img from another lgv30 phone to my phone? I am using lgv30 docomo up via rom lgmv300k in Korea now my phone is receiving the sim but no signal is on. Currently there is lg v30 docomo in operation normally.

 

[ChazzMatt]

everything worked. thank you very much. May I ask for your help once more, how can I get the modem.img from another lgv30 phone to my phone? I am using lgv30 docomo up via rom lgmv300k in Korea now my phone is receiving the sim but no signal is on. Currently there is lg v30 docomo in operation normally.

There's a thread for Korean models and they discuss how to get the Korean modem back after bootloader unlock and root.

Korean variant bootloader unlock and root.

THIS THREAD IS FOR KOREAN VARIANT LG V30 TO GET THE SIGNAL MODEL SUPPORTED : V300S, V300L V300K FOLLOW THE GUIDE BELOW AND DONT MESS UP. DONT DO ANY EXTRA STEP THAT IS NOT MENTION HERE. WE WILL NOT HOLD ANY RESPONSIBLE IF YOUR DEVICE GO...

forum.xda-developers.com

Hope that helps. I don't have time right now to go through the thread to see the exact post. I know some of the links in that thread post #1 appear dead -- but most of them were just mirrors to MY posts, in my ChazzMatt Android File Host account. You can find most of them there if you look.

This guy has Docomo I believe and restored his modem from a backup:

Unstable WiFi on LG V30

Hi, so I am having issues with the Wifi on my, recently acquired, LG V30. I have got a strange model, L-01K, from Japanese provider DOCOMO. I have unrooted / flashed .. currently running Havoc 3.11 on Android 10. The wifi often loses...

forum.xda-developers.com

At the end of everything I restored the modem partition from a backup image I had.
E.g.:

dd if=/external_sd/backup/modem.img of=/dev/block/bootdevice/by-name/modem

And that did the trick.

 

[Osprey00]

From Telegram:

Stock US99830b twrp flashable zip
This stock pie twrp zip should be able to be flashed after using aosp 10/11 without issues and might fix problems in aosp 10/11 which needs nougat to fix

Everything is already patched so no need to flash any other zips
(Base zip made by JohnFawkes I replaced some files to fix some stuff)

US99830b.zip

drive.google.com

 

[gimpy1]

Thx, for updating this rom. I installed it earlier this week, and it is running very nice.