S731NKSU9CZIF – Galaxy S25 FE firmware
Build S731NKSU9CZIF is a feature update for the Galaxy S25 FE (SM-S731N)
on Android 17 (One UI 9). It first appeared on Samsung's servers on Sep 27, 2026 (method) and has reached
4 regions so far. It keeps bootloader bit 9, so downgrading to the previous build S731NKSS9BZH2 is still possible. Samsung still serves this file.
- Model
- SM-S731N
- Android
- Android 17
- Type
- Feature
- Bootloader bit
- 9
- First released
- Sep 27, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received S731NKSU9CZIF, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Sep 27, 2026 | day 0 | S731NKSU9CZIF/S731NOKR9CZIF/S731NKSU9CZI5 |
KTC | South Korea (KT) | Sep 27, 2026 | day 0 | S731NKSU9CZIF/S731NOKR9CZIF/S731NKSU9CZI5 |
LUC | South Korea (LG U+) | Sep 27, 2026 | day 0 | S731NKSU9CZIF/S731NOKR9CZIF/S731NKSU9CZI5 |
SKC | South Korea (SKT) | Sep 27, 2026 | day 0 | S731NKSU9CZIF/S731NOKR9CZIF/S731NKSU9CZI5 |
Download and release notes
samloader download -m SM-S731N -r KOO -v S731NKSU9CZIF/S731NOKR9CZIF/S731NKSU9CZI5Samsung's release notes and security patch level for this update: SM-S731N / KOO on doc.samsungmobile.com. What each part of the build number means: decode S731NKSU9CZIF.