
Samsung Galaxy Tab A S 8.0
The latest firmware for Samsung Galaxy Tab A S 8.0 (SM-T357W) is T357WVLU1APB3 with Android 5.0.2 (Lollipop), released on March 9, 2016 for 4 regions (CSC). Every official firmware build for SM-T357W, 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/T357WVLU1APB3
All 3 builds in our database run Android 5.0.2 (Lollipop). The newest build, T357WVLU1APB3, was released on March 9, 2016. No new build has appeared for 129 months, so regular updates for this model have most likely ended.

SM-T357T

SM-T355C

SM-T2558

SM-T365Y

SM-T2519
The newest firmware for SM-T357W runs Android 5.0.2 (Lollipop): build T357WVLU1APB3, released on March 9, 2016.
The latest build for SM-T357W, T357WVLU1APB3, was released on March 9, 2016 (10 years ago).
SM-T357W has had no new firmware for 129 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T357W are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T357W, 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-T357W.