S931BXXSACZF2 – Galaxy S25 firmware
Build S931BXXSACZF2 is a security update for the Galaxy S25 (SM-S931B)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 24, 2026 (method) and has reached
1 region so far. It keeps bootloader bit 10, so downgrading to the previous build S931BXXUACZF1 is still possible. Samsung still serves this file.
- Model
- SM-S931B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 10
- First released
- Jun 24, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received S931BXXSACZF2, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
XID | Indonesia | Jun 24, 2026 | day 0 | S931BXXSACZF2/S931BOXMACZF2/S931BXXUACZF1 |
Download and release notes
samloader download -m SM-S931B -r XID -v S931BXXSACZF2/S931BOXMACZF2/S931BXXUACZF1Samsung's release notes and security patch level for this update: SM-S931B / XID on doc.samsungmobile.com. What each part of the build number means: decode S931BXXSACZF2.