MetroPCS Launches World's First Commercially Available Voice Over LTE Service and VoLTE-Capable 4G LTE Smartphone

DALLAS, Aug. 7, 2012 /PRNewswire/ -- MetroPCS Communications, Inc. (NYSE: PCS) today reached another innovation milestone by announcing the world's first commercial launch of Voice over LTE (VoLTE) services, availability of the world's first VoLTE-capable handsets and the first sale...