Good news for everybody! The new LG-UP v 1.15.06 not only allows us to install Pie, but also Cross Flash between devices.
Example: I live in Europe - Romania and I wanted my language for my LG G7+ EAW. Unfortunatetly this model is for Hong Kong and does not support most of european languages. No problem with this new LGUP. I just crossflashed my LG G7+ 6Gb Ram, dual sim to LMG710 EM. Maybe I can unlock bootloader with a little help.
I also flashed 2 diffrent LG G710N korean firmwares. All working fine.
The only problem was with the Korean open firmware, not supporting sim network, but I reverted back and it worked.
Easy commands for this new LGUP v1.15.06
If using powershell from win10:
1. Install USB drivers and put G7 in download mode
2 Open powershell from C:\Program Files (x86)\LG Electronics\LGUP (shift + right mouse) and type cmd and hit enter.
3. Type this command: lgup_cmd.exe comX "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "(path to your kdz firmware)"
Example: (if your phone is under com5 and your kdz is located in D:\ and has this name G710NO20c.kdz)
lgup_cmd.exe com5 "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "D:\G710NO20c.kdz"
LGUP new version - https://drive.google.com/file/d/1dJZ...jumm5mtKp/view
LGUP common.dll https://drive.google.com/file/d/1V8I...W4gRj2uo0/view
Credits to LameMonster82 for his guide here: https://forum.xda-developers.com/lg-...-aosp-t3914079