X826NKOSADZH1 – Galaxy Tab S10+ 5G firmware
Build X826NKOSADZH1 is a security update for the Galaxy Tab S10+ 5G (SM-X826N)
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 X826NKOS9DZG1 is blocked. Samsung still serves this file.
- Model
- SM-X826N
- 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 X826NKOSADZH1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Aug 30, 2026 | day 0 | X826NKOSADZH1/X826NKOOADZH1/X826NKOSADZH1 |
Download and release notes
samloader download -m SM-X826N -r KOO -v X826NKOSADZH1/X826NKOOADZH1/X826NKOSADZH1Samsung's release notes and security patch level for this update: SM-X826N / KOO on doc.samsungmobile.com. What each part of the build number means: decode X826NKOSADZH1.