
Samsung Galaxy Tab4 8.0
The latest firmware for Samsung Galaxy Tab4 8.0 (SM-T331) is T331XXS1BSA2 with Android 4.4.2, released on January 9, 2019 for 3 regions (CSC). Every official firmware build for SM-T331, 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/T331XXS1BSA2
All 30 builds in our database run Android 4.4.2. The newest build, T331XXS1BSA2, was released on January 9, 2019. No new build has appeared for 94 months, so regular updates for this model have most likely ended.
Box codes of SM-T331 for different colors and markets. Firmware is chosen by the model code SM-T331 and your region (CSC), not by the SKU.

SM-T290N

SM-T537A

SM-T800X

SM-T807V

SM-T230X

SM-T230NY

SM-T237V

SM-T232
The newest firmware for SM-T331 runs Android 4.4.2: build T331XXS1BSA2, released on January 9, 2019.
The latest build for SM-T331, T331XXS1BSA2, was released on January 9, 2019 (7 years ago).
SM-T331 has had no new firmware for 94 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T331 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T331, 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-T331.