Following AT&T and Verizon, T-Mobile has announced the launch of voice-over-LTE on its network, starting in the Seattle area. T-Mobile has already been offering HD Voice, though not on a VoLTE network. The carrier says users of certain devices can download a software update to access VoLTE, though the iPhone is not included in the brief list. It’s noted that T-Mobile will be adding cities and devices while increasing the size of the network.…
