Download Android 5.0.1 Lollipop KDZ For T-Mobile LG G3
The LG G3 owners on T-Mobile network are now receiving the Android 5.0.1 Lollipop update officially. It does not seem to be available on OTA (over-the-air) but you can use load it with your computer. LG’s support tool for your computer can be used to update your phone. Even it does not wipe anything important to you on your phone. The process is simple, plug phone to computer using a USB connection and run the tool. Then get info about software on tool and start updating, it should bring you software version D85120b. It is being reported that over web that Wi-Fi calling and voice over LTE (volte) are available with update.
Further, one of XDA developers have captured that T-Mobile LG G3 Lollipop 20B .img file you can flash. If you are an advance user, download the .img file and start installation manually. You can know about the installation and download the KDZ on the original thread of XDA.