The LG G Flex on T-Mobile receiving an update to Android 4.4 KitKat. The update package will upgrade your LG G Flex software version to D95920h.
Android version: 4.4.2
Baseband version: M8974A-AAAANAZM-2.0.20013
Kernel version: 3.4.0
Build number: JDQ39B
Software version: D95920h
Please check T-mobile offcial Support page for details