X826NKOSBDZI3 – Galaxy Tab S10+ 5G firmware
Build X826NKOSBDZI3 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 Sep 20, 2026 (method) and has reached
1 region so far. It raises the bootloader bit from 10 to 11: once installed, the device no longer accepts firmware with bit 10 or lower, so a downgrade to X826NKOSADZH1 is blocked. Samsung still serves this file.
- Model
- SM-X826N
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 11
- First released
- Sep 20, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received X826NKOSBDZI3, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Sep 20, 2026 | day 0 | X826NKOSBDZI3/X826NKOOBDZI3/X826NKOSBDZI3 |
Download and release notes
samloader download -m SM-X826N -r KOO -v X826NKOSBDZI3/X826NKOOBDZI3/X826NKOSBDZI3Samsung'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 X826NKOSBDZI3.