It definitely sounds like the core problem now is voice support on newer network settings rather than the SIM itself, especially if SMS and 4G data are fine. Checking the VoLTE whitelist and your exact model is key here, since older iPhones like the ...
It does sound more like an iOS configuration issue than your physical SIM being “deleted,” especially after juggling a few travel eSIMs. I’d still follow the advice above: remove any leftover eSIMs, power off, eject/reinsert the physical SIM, then do...
It sounds like your TM SIM worked initially but then stopped, which usually points to a verification or network issue. Sometimes this happens if registration details don’t fully match or if the SIM hasn’t been properly activated on the network. You m...
