S948NKSU4AZHJ – Galaxy S26 Ultra firmware
Build S948NKSU4AZHJ is a feature update for the Galaxy S26 Ultra (SM-S948N)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Aug 25, 2026 (method) and has reached
4 regions so far. It keeps bootloader bit 4, so downgrading to the previous build S948NKSS4AZG3 is still possible. Samsung still serves this file.
- Model
- SM-S948N
- Android
- Android 16
- Type
- Feature
- Bootloader bit
- 4
- First released
- Aug 25, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received S948NKSU4AZHJ, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
LUC | South Korea (LG U+) | Aug 25, 2026 | day 0 | S948NKSU4AZHJ/S948NOKR4AZHJ/S948NKSS4AZG1 |
SKC | South Korea (SKT) | Aug 25, 2026 | day 0 | S948NKSU4AZHJ/S948NOKR4AZHJ/S948NKSS4AZG1 |
KOO | South Korea | Aug 25, 2026 | day 0 | S948NKSU4AZHJ/S948NOKR4AZHJ/S948NKSS4AZG1 |
KTC | South Korea (KT) | Aug 25, 2026 | day 0 | S948NKSU4AZHJ/S948NOKR4AZHJ/S948NKSS4AZG1 |
Download and release notes
samloader download -m SM-S948N -r KOO -v S948NKSU4AZHJ/S948NOKR4AZHJ/S948NKSS4AZG1Samsung's release notes and security patch level for this update: SM-S948N / KOO on doc.samsungmobile.com. What each part of the build number means: decode S948NKSU4AZHJ.