T-Mobile has started seeding Android 6.0.1 Marshmallow based latest security update for LG G4. The update carries build number H81120v brings Google monthly security enhancements e911 timer fix and is rolling out via OTA as we speak. These monthly security updates are important as it ensures security of the device from Viruses and Malware.
If you haven’t received the OTA notification then unlock your device and go to Settings > About phone > Software updates. Tap on check for new firmware updates, if the H81120v firmware is available for your device you would be notified, just download and install it on your device.
The T-Mobile LG G4 is not receiving the expected Nougat firmware but if you are good at flashing custom ROMs then we recommend you to try the latest Lineage OS 14.1 ROM on your device.
How to install H81120v Marshmallow firmware KDZ on T-Mobile LG G4
Download LG Flashtool along latest drivers. Click here