Only thing I can contribute regarding volte is, before we went cell phones only, our home land line to save some money went from standard real land line to VoIP. The quality despite good connection was decent but not great. You'd lose words sometimes. Other times it would sound "airy" and you'd lose whole sentences someone said. I hope if volte is the only way eventually that they've worked out the kinks.
They're gonna have alot of angry customers if volte kills bring your own device too
