Has anyone overcame the Android 12 problem? Seems to be a driver compatibility issue , right?
I have a G8x ATT cross flashed to G850QM40b running on T-Mobile. The Current MCFG Status is ROW_ATT. Volte and WiFi calling work (I checked) , but the settings are grayed out. No big deal. But I would like to change it back to TMO. I have done that before, but it was running Android 11.
Downgraded to G850QM30b A11. Connected to PDC, sure enough, found ROW_ATT, ATT, and Netxxxx(?) MBNs. Removed ROW_ATT, added TMO mbn. Inserted Sim card, and saw TMO mbn loaded. Then upgraded back to G850QM40b (A12) and checked the MCFG status. TMO was there.
I did "lose" the S/N, so used Qfil to insert the S/N into the ftm.bin. All fixed.