
Samsung Galaxy Tab S6 5G
The latest firmware for Samsung Galaxy Tab S6 5G (SM-T866N) is T866NKOU5DXJ1 with Android 12, released on October 2, 2024 for 1 region (CSC). Every official firmware build for SM-T866N, newest first: one row per build with all regions (CSC) that received it.
Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/T866NKOU5DXJ1
SM-T866N started on Android 9 and has received 3 major Android upgrades; it now runs Android 12. The newest build, T866NKOU5DXJ1, was released on October 2, 2024. No new build has appeared for 25 months, so regular updates for this model have most likely ended.

SM-T867V

SM-T875N

SM-T976N

SM-T975N

SM-T837A
The newest firmware for SM-T866N runs Android 12: build T866NKOU5DXJ1, released on October 2, 2024.
The latest build for SM-T866N, T866NKOU5DXJ1, was released on October 2, 2024 (2 years ago).
SM-T866N has had no new firmware for 25 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T866N are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T866N, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing SM-T866N.