S938NKSUACZF1 – Galaxy S25 Ultra firmware
Build S938NKSUACZF1 is a feature update for the Galaxy S25 Ultra (SM-S938N)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 10, 2026 (method) and has reached
4 regions so far. It keeps bootloader bit 10, so downgrading to the previous build S938NKSSACZE1 is still possible. Samsung still serves this file.
- Model
- SM-S938N
- Android
- Android 16
- Type
- Feature
- Bootloader bit
- 10
- First released
- Jun 10, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received S938NKSUACZF1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Jun 10, 2026 | day 0 | S938NKSUACZF1/S938NOKRACZF1/S938NKSUACZE9 |
KTC | South Korea (KT) | Jun 10, 2026 | day 0 | S938NKSUACZF1/S938NOKRACZF1/S938NKSUACZE9 |
LUC | South Korea (LG U+) | Jun 10, 2026 | day 0 | S938NKSUACZF1/S938NOKRACZF1/S938NKSUACZE9 |
SKC | South Korea (SKT) | Jun 10, 2026 | day 0 | S938NKSUACZF1/S938NOKRACZF1/S938NKSUACZE9 |
Download and release notes
samloader download -m SM-S938N -r KOO -v S938NKSUACZF1/S938NOKRACZF1/S938NKSUACZE9Samsung's release notes and security patch level for this update: SM-S938N / KOO on doc.samsungmobile.com. What each part of the build number means: decode S938NKSUACZF1.