The problem is that there is no cross-carrier HD voice or VoLTE. If you call someone on another carrier your call quality will be flushed down the toilet.<p>These idiots refuse to inter-operate. This is why data calling (Facetime audio, Google Hangouts(?), Skype, Whatsapp, etc) is going to crush the cellular industry. It&#x27;s going to be fragmented and ugly, but at least the call quality won&#x27;t suck.