Samsung Galaxy Note 4 (SM-N910T2) Firmware Overview
The archive lists 3 official builds for the Samsung Galaxy Note 4 across 1 region (CSC). The newest one is N910T2UVU2AOG1, released November 2, 2020 with Android 4.4.4. It is a feature update on bootloader binary 2: once a phone runs it, firmware with a lower binary can no longer be flashed (how to read a build number).
How to Flash SM-N910T2 Firmware
Put the Samsung Galaxy Note 4 into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with the same or a higher Bit than the one installed — a lower bootloader binary will be rejected.