T-Mobile announced during its earnings report that it has now completed its US roll-out of its Voice over LTE service after its launch in Seattle back in May and expansion to 16 markets last month.

With more than 8 million VoLTE-capable devices on the T-Mobile network, our customers have made over 52 million crystal-clear VoLTE calls to date.

VoLTE offers faster call setup and better audio quality during calls through HD Voice, as well as the ability to switch seamlessly between voice and video calls. It’s supported by a limited number of handsets at present, with the Galaxy S5, Galaxy Note 3, Galaxy Light and LG’s G Flex among them, but is likely to become a standard feature over time. Verizon has also announced that it will be launching its own VoLTE service nationwide later in the year.

T-Mobile also noted that JD Power just ranked T-Mobile the highest in customer service among the top four major U.S. wireless providers, AT&T taking second place, Verizon third and Sprint Nextel fourth.

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