S731NKSS7BZF1 – Galaxy S25 FE firmware
Build S731NKSS7BZF1 is a security update for the Galaxy S25 FE (SM-S731N)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 9, 2026 (method) and has reached
4 regions so far. It keeps bootloader bit 7, so downgrading to the previous build S731NKSS7BZE1 is still possible. Samsung still serves this file.
- Model
- SM-S731N
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 7
- First released
- Jun 9, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received S731NKSS7BZF1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Jun 9, 2026 | day 0 | S731NKSS7BZF1/S731NOKR7BZF1/S731NKSS7BZE1 |
KTC | South Korea (KT) | Jun 9, 2026 | day 0 | S731NKSS7BZF1/S731NOKR7BZF1/S731NKSS7BZE1 |
LUC | South Korea (LG U+) | Jun 9, 2026 | day 0 | S731NKSS7BZF1/S731NOKR7BZF1/S731NKSS7BZE1 |
SKC | South Korea (SKT) | Jun 9, 2026 | day 0 | S731NKSS7BZF1/S731NOKR7BZF1/S731NKSS7BZE1 |
Download and release notes
samloader download -m SM-S731N -r KOO -v S731NKSS7BZF1/S731NOKR7BZF1/S731NKSS7BZE1Samsung'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 S731NKSS7BZF1.