How do I enable Wifi Calling?
I have a Samsung S9+, model SM-G965U1. I don't see anywhere an option to enable wifi calling. The phone is an unlocked device. I previous had Verizon prepaid and it worked, not I'm on AT&T prepaid I don't see how to enable it.
Also, I have a voicemail notification in the notification bar that will not disappear, even after checking voicemail (there wasn't one). All I can do is snooze the notification. ???