
Samsung Galaxy Tab A 9.7
The latest firmware for Samsung Galaxy Tab A 9.7 (SM-P555C) is P555CZCS1BRG1 with Android 6.0.1 (Marshmallow), released on September 3, 2018 for 1 region (CSC). Every official firmware build for SM-P555C, 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/P555CZCS1BRG1
SM-P555C started on Android 5 and has received 1 major Android upgrade; it now runs Android 6.0.1 (Marshmallow). The newest build, P555CZCS1BRG1, was released on September 3, 2018. No new build has appeared for 99 months, so regular updates for this model have most likely ended.
- The latest Android security patch has been applied.
ㆍDevice security has been further enhanced.

SM-P580X

SM-P610X

SM-P620

SM-P605V

SM-P605L

SM-P605K

SM-P625

SM-P907A
The newest firmware for SM-P555C runs Android 6.0.1 (Marshmallow): build P555CZCS1BRG1, released on September 3, 2018.
The latest build for SM-P555C, P555CZCS1BRG1, was released on September 3, 2018 (8 years ago).
SM-P555C has had no new firmware for 99 months, so regular updates have most likely ended.
Yes, all firmware files for SM-P555C are 100% official, original, and obtained directly from Samsung servers.
To flash SM-P555C, 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-P555C.