I have Samsung s10+ and when roaming in Georgia I found out on AT&T: data worked, sms worked, but voice calls would not work.Voice calls would not work most likely because my phone is not on PM's VoLTE whitelist. By switching to T-Mobile's network m...
I can confirm Switching from auto network selection to manually select T-Mobile got my voice calls working. (In Georgia)My Samsung s10+ would automatically connect to AT&T which worked for both data and SMS but I was unable to make and receive calls....