
Samsung Galaxy Tab3 7.0
The latest firmware for Samsung Galaxy Tab3 7.0 (SM-T210R) is T210RUEAMK1 with Jelly(Android Bean), released on November 4, 2013 for 1 region (CSC). Every official firmware build for SM-T210R, 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/T210RUEAMK1
All 5 builds in our database run Android 4.4.2 (KitKat). The newest build, T210RUEAMK1, was released on November 4, 2013. No new build has appeared for 157 months, so regular updates for this model have most likely ended.
Box codes of SM-T210R for different colors and markets. Firmware is chosen by the model code SM-T210R 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-T210R runs Android 4.4.2 (KitKat): build T210RUEAMK1, released on November 4, 2013.
The latest build for SM-T210R, T210RUEAMK1, was released on November 4, 2013 (12 years ago).
SM-T210R has had no new firmware for 157 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T210R are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T210R, 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-T210R.