28-09-2024 13:46
Have O2 account. Roaming data on. 4G comparable device and it’s enabled why can I make phone calls?
28-09-2024 13:55
Try manually selecting different network.
Yiu can use either AT&T or T-Mobile.
28-09-2024 14:07
Make sure 4G Calling is enabled
28-09-2024 14:13
I assumed that's what they meant with "4G comparable device and it’s enabled"
28-09-2024 14:53