Review of VoLTE on MTN Nigeria: Is 4G Calling as superb as advertised?
I am currently using VoLTE on MTN Nigeria, and I can tell you that it is the next best thing since Agege bread.
VoLTE
VoLTE in Nigeria: Which networks and what phones support it?
Information on VoLTE in Nigeria, which networks support it, and what available phones are compatible.