T-Mobile's VoLTE rollout is continuing full steam ahead, and today, the Uncarrier is giving more customers access to it thanks to a new software update for LG's mammoth G Flex.
Beginning November 17, the LG G Flex will have a software update to Android KitKat 4.4.2/SWV20s that turn on VoLTE services via OTA over Wi-Fi in available VoLTE markets only. For devices not in VoLTE markets, the update will also be available via OTA via Wi-Fi or the LG Mobile Support Tool.

[No, It's Not Lollipop] T-Mobile LG G Flex Getting OTA Update To Enable VoLTE And In-Flight Texting was written by the awesome team at Android Police.