X926NKOSADZH1 – Galaxy Tab S10 Ultra 5G firmware
Build X926NKOSADZH1 is a security update for the Galaxy Tab S10 Ultra 5G (SM-X926N)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Aug 30, 2026 (method) and has reached
1 region so far. It raises the bootloader bit from 9 to 10: once installed, the device no longer accepts firmware with bit 9 or lower, so a downgrade to X926NKOS9DZG1 is blocked. Samsung still serves this file.
- Model
- SM-X926N
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 10
- First released
- Aug 30, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received X926NKOSADZH1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Aug 30, 2026 | day 0 | X926NKOSADZH1/X926NKOOADZH1/X926NKOSADZH1 |
Download and release notes
samloader download -m SM-X926N -r KOO -v X926NKOSADZH1/X926NKOOADZH1/X926NKOSADZH1Samsung's release notes and security patch level for this update: SM-X926N / KOO on doc.samsungmobile.com. What each part of the build number means: decode X926NKOSADZH1.