
Samsung Galaxy Tab A
The latest firmware for Samsung Galaxy Tab A (SM-T355C) is T355CZCU1BRI1 with Android 6.0.1 (Marshmallow), released on September 9, 2018 for 1 region (CSC). Every official firmware build for SM-T355C, 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/T355CZCU1BRI1
SM-T355C started on Android 5 and has received 1 major Android upgrade; it now runs Android 6.0.1 (Marshmallow). The newest build, T355CZCU1BRI1, was released on September 9, 2018. No new build has appeared for 98 months, so regular updates for this model have most likely ended.
Specifications of SM-T355Y, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.
- The Email app has been changed so that it is deletable. (Users can now uninstall the Email app.)
- Removed the Baidu Maps app.
- Other bug fixes
ㆍFixed an issue that the device screen displays a dual clock widget.
- The latest Android security patch has been applied.
ㆍDevice security has been further enhanced.

SM-T355

SM-T357W

SM-T2558

SM-T365Y

SM-T2519
The newest firmware for SM-T355C runs Android 6.0.1 (Marshmallow): build T355CZCU1BRI1, released on September 9, 2018.
The latest build for SM-T355C, T355CZCU1BRI1, was released on September 9, 2018 (8 years ago).
SM-T355C has had no new firmware for 98 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T355C are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T355C, 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-T355C.