Not sure how else to make this happen. If they come back with the "talk to carrier" response, then that is no better than HTC, because the carriers say "talk to the manufacturer". I've been down that path. We all know how that ended for HTC, people stop buying their phones. Surely someone on the official ASUS forums can get the ball rolling. XDA is already carrying the weight of Volte support atm. It's an easy enough fix tbh.