VoLTE-HD has been a thing for many years and the reason people haven't noticed is that most personal voice calls have transitioned to messaging apps and most of

VoLTE-HD has been a thing for many years and the reason people haven't noticed is that most personal voice calls have transitioned to messaging apps and most of what's left are to or from businesses who have the cheapest VoIP setup they can get away with. Two handsets connected with EVS/VoLTE-HD sound superior to two analog phones on the same circuit, talking to each other. If I call my parents' iPhone using my iPhone the call connects using a high-bitrate EVS codec, crystal clear. I never do that, of course. I FaceTime them.