LG LMG820UM AT&T CROSSFLASH OPEN_CA VoLTE COMPATIBILITY - LG G8 Questions & Answers

I have an AT&T LG G8 ThinQ LMG820UM running Android 11. I wanna know if I crossflash an Open_CA firmware/ROM onto it, would it work with the VoLTE on AT&T's network without having to call AT&T to disable the 3G blocker? Does anyone have personal experience with this?

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[Q] Installing F400S firmware on D850 hardware possible?

I would like to install the Korean (specifically SK Telecom model) variant of the firmware, the F400S, on my AT&T G3, the D850.
Reason I ask is because I brought my AT&T G3 phone to Korea and was able to get on SK Telecom's network. But little quirks like not being able to use hotspot tethering, visual voicemail, and access to SK Telecom specific appstore is becoming a hassle.
Would it be advisable to flash my D850 with F400S firmware? Anyone ever tried this or have any insight into this matter?
Much appreciate it. Thanks.

Lg us990 (us cellular) unlock or flash??

I have a US Cellular LG US990 G3 that is ineligible for activation on US Cellular. Can this specific model be flashed or unlocked for use on a different carrier? Thanks!
Bump for an answer...need to know as well

Using internet in unlocked sprint lg g3 ls990 in bangladesh

Users from bangladesh of sprint lg g3 ls990 suffering from sim network available but no internet connection after sim unlocking can try this:
Root your device and install twrp and then flash any gsm rom like cloudy g3 or prime gsm.You will have your sprint g3 2g/3g unlocked.As i couldnt find any other way to use internet in stock rom.thanx

VoLTE and VoWifi on LG G8s?

Anybody has VoLTE and VoWifi working on LG G8s and care to share what LM-G810EAW firmware you used?
Same problem here!can i enable volte with cosmote greece carrier?

Install Stock G7 ThinQ on Verizon G7 ThinQ

Possibly stupid question from a novice. I have a G7 ThinQ (LM-G710VM) which I bought from Verizon. I switched to Mint Mobile (uses T-Mobile towers) and need to use Wi-Fi Calling due to signal strength issues. Mint Wi-Fi calling doesn't work on the Verizon version of the phone. Is it possible to load the T-Mobile firmware on this phone? Or the LG Stock Firmware? If so, could someone point me to a thread that discusses this. I've been unable to find the right one if it exists. Thanks in advance for your patience and help.
You should look at changing your VoLTE settings possibly. As for easy crossflashing of firmware, I did this last night and it is simple, no need to unlock bootloader etc. Only issue is it does not do t-mobile, but a generic rom may work.
https://forum.xda-developers.com/lg-g7-thinq/how-to/cross-flash-oreo-pie-firmwares-lg-g7-g7-t3915303

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