
Samsung Galaxy Tab 8.9 (WiFi)
The latest firmware for Samsung Galaxy Tab 8.9 (WiFi) (GT-P7310) is P7310ZSLPA with Ice(Android Cream), released on October 4, 2012 for 1 region (CSC). Every official firmware build for GT-P7310, 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/P7310ZSLPA
All 14 builds in our database run Android 3.2 (Honeycomb). The newest build, P7310ZSLPA, was released on October 4, 2012. No new build has appeared for 171 months, so regular updates for this model have most likely ended.
Box codes of GT-P7310 for different colors and markets. Firmware is chosen by the model code GT-P7310 and your region (CSC), not by the SKU.

GT-P6810

GT-P6211

GT-P6210

GT-P6200

GT-P1010

GT-P1000N

GT-P1000M

GT-P7320T
The newest firmware for GT-P7310 runs Android 3.2 (Honeycomb): build P7310ZSLPA, released on October 4, 2012.
The latest build for GT-P7310, P7310ZSLPA, was released on October 4, 2012 (14 years ago).
GT-P7310 has had no new firmware for 171 months, so regular updates have most likely ended.
Yes, all firmware files for GT-P7310 are 100% official, original, and obtained directly from Samsung servers.
To flash GT-P7310, 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 GT-P7310.