On ATT, they only allow use of volte for phones on a special list, regardless of the phone's actual capabilities. When they turned off their 3G, I had to get a

On ATT, they only allow use of volte for phones on a special list, regardless of the phone's actual capabilities. When they turned off their 3G, I had to get a new phone to replace my newish 4G phone that works fine on volte on any other carrier (it actually worked fine on ATT for a bit until they caught on that the phone was not on their special list). I have to stay with ATT though, because they are the only ones who provide coverage in this one area where coverage is critical for me. I tried an mvno on ATTs network, but ATT gives all of them 2nd or 3rd tier service.