
Samsung Galaxy Tab3 7.0
The latest firmware for Samsung Galaxy Tab3 7.0 (SM-T215) is T215XXUBNJ2 with Android 4.4.2 (KitKat), released on November 12, 2014 for 4 regions (CSC). Every official firmware build for SM-T215, 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/T215XXUBNJ2
All 3 builds in our database run Android 4.4.2 (KitKat). The newest build, T215XXUBNJ2, was released on November 12, 2014. No new build has appeared for 145 months, so regular updates for this model have most likely ended.

SM-T210X

SM-T217T

SM-T227

SM-T310

SM-T116NY
The newest firmware for SM-T215 runs Android 4.4.2 (KitKat): build T215XXUBNJ2, released on November 12, 2014.
The latest build for SM-T215, T215XXUBNJ2, was released on November 12, 2014 (11 years ago).
SM-T215 has had no new firmware for 145 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T215 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T215, 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-T215.