
T-Mobile USA is the first carrier to launch HD voice service in the United States.
T-Mobile USA said HD Voice is now available on its network nationwide for customers with HD voice capable smartphones, such as the HTC One S, Nokia Astound and Samsung Galaxy S. Both parties on the call must be using HD Voice capable smartphones and be connected to T-Mobile's HD Voice-enabled network. There is no additional cost. T-Mobile said users will experience fuller,...