T-Mobile Network Denied on Xperia 10 II

[cyberlyra]

I seem to remember @robthebold was having this problem with the 10ii back in August, any ideas? (@hackman238 was a big help then too, as now)

VoLTE provider support

OK, I have a new-to-me OnePlus 6T, the T-Mobile version, now carrier unlocked. It’s running Android 11. I put the USMobile SIM that had been not working in the SFOS Xperia 10 II in there and it started working in short order. After verifying function for about a day, I’ve moved the SIM into the 10 II, and after a minute or so I got network connection and 4g voice working. For now it’s still running. So I’ve tried 3 brand-new SIMs in the Sony 10 II running SFOS before putting them in another dev…