X936NKOS9BZI1 – Galaxy Tab S11 Ultra 5G firmware
Build X936NKOS9BZI1 is a security update for the Galaxy Tab S11 Ultra 5G (SM-X936N)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 17, 2026 (method) and has reached
1 region so far. It raises the bootloader bit from 8 to 9: once installed, the device no longer accepts firmware with bit 8 or lower, so a downgrade to X936NKOS8BZH4 is blocked. Samsung still serves this file.
- Model
- SM-X936N
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 9
- First released
- Sep 17, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received X936NKOS9BZI1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Sep 17, 2026 | day 0 | X936NKOS9BZI1/X936NKOO9BZI1/X936NKOS9BZI1 |
Download and release notes
samloader download -m SM-X936N -r KOO -v X936NKOS9BZI1/X936NKOO9BZI1/X936NKOS9BZI1Samsung's release notes and security patch level for this update: SM-X936N / KOO on doc.samsungmobile.com. What each part of the build number means: decode X936NKOS9BZI1.