Today, T-Mobile Samsung Galaxy Note 4 now getting Android 6.0.1 Marshmallow update. It based on version N910TUVU2DPE3 or N910T3UVU1DPE.
This update provides features and improvements:
Anti-theft update (N910T3UVU1DPE3 only)
Google Voice fix (N910TUVU2DPE3 only)
Android Marshmallow comes with new features like battery optimizations Doze, App permissions, monthly security patches and Google Now on Tap.
For more details on Android Marshmallow Click here.