Samsung Galaxy Tab S12 Ultra 5G (SM-X946N) Firmware Overview
What is the latest SM-X946N firmware?
X946NKOU2AZJA, released November 2, 2026 with Android 17. It is a feature update on bootloader binary 2. The archive holds 2 official builds across 1 region (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy Tab S12 Ultra 5G still getting updates?
Yes. The newest build is from November 2026.
Can I downgrade the SM-X946N firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 1 to 2:
- Binary 2 — since Oct 2026
- Binary 1 — since Aug 2026
A phone already on binary 2 rejects builds with a lower binary in Odin ("SW REV CHECK FAIL"), so it can go back to an earlier Android version only if that version has a binary 2 build. How to read a build number.
All SM-X946N firmware builds
How to Flash SM-X946N Firmware
Put the Samsung Galaxy Tab S12 Ultra 5G into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with Bit 2 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.