MetroPCS has pushed back its planned launch of voice-over-Long Term Evolution (VoLTE) services to the second half of 2012, Ed Chao, senior vice president of engineering and network operations told FierceBroadbandWireless. Chao confirmed reports that MetroPCS is continuing to test VoLTE on an ongoing basis in an unidentified market. Chao commented: ‘If you keep voice on CDMA and data only on LTE, which is kind of what we’re doing today before VoLTE, you’re not able to refarm. So, for us, it’s extremely important to have VoLTE so we can get that traffic off of CDMA and get ourselves refarmed fully to LTE’. During the company’s quarterly analyst conference call last month, MetroPCS CEO Roger Linquist said the operator will have at least one VoLTE-capable handset on sale by the second half of the year.