
Samsung Galaxy Tab Advanced2
The latest firmware for Samsung Galaxy Tab Advanced2 (SM-T583) is T583KOU1BTG1 with Android 8.0.0 (Oreo), released on July 15, 2020 for 1 region (CSC). Every official firmware build for SM-T583, 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/T583KOU1BTG1
All 4 builds in our database run Android 8.0.0 (Oreo). The newest build, T583KOU1BTG1, was released on July 15, 2020. No new build has appeared for 76 months, so regular updates for this model have most likely ended.

SM-T290N

SM-T537A

SM-T800X

SM-T807V

SM-T230X

SM-T230NY

SM-T237V

SM-T232
The newest firmware for SM-T583 runs Android 8.0.0 (Oreo): build T583KOU1BTG1, released on July 15, 2020.
The latest build for SM-T583, T583KOU1BTG1, was released on July 15, 2020 (6 years ago).
SM-T583 has had no new firmware for 76 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T583 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T583, 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-T583.