Answer
How do I know if my device supports VoLTE?
The list of VoLTE device models will be available on cellcard website, or you can check your phone settings by going into Settings > Cellular > Cellular Data Options > Voice & Data > VoLTE ON.
The list of VoLTE device models will be available on cellcard website, or you can check your phone settings by going into Settings > Cellular > Cellular Data Options > Voice & Data > VoLTE ON.