S9310ZHSEDZJ1 – Galaxy S25 firmware
Build S9310ZHSEDZJ1 is a security update for the Galaxy S25 (SM-S9310)
on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 25, 2026 (method) and has reached
2 regions so far. It raises the bootloader bit from 13 to 14: once installed, the device no longer accepts firmware with bit 13 or lower, so a downgrade to S9310ZCSDCZI1 is blocked. Samsung still serves this file.
- Model
- SM-S9310
- Android
- Android 17
- Type
- Security
- Bootloader bit
- 14
- First released
- Oct 25, 2026
- Regions
- 2
Rollout timeline by region
The date each region code (CSC) first received S9310ZHSEDZJ1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
BRI | Taiwan | Oct 25, 2026 | day 0 | S9310ZHSEDZJ1/S9310OZSEDZJ1/S9310ZCSEDZJ1 |
TGY | Hong Kong | Oct 25, 2026 | day 0 | S9310ZHSEDZJ1/S9310OZSEDZJ1/S9310ZCSEDZJ1 |
Download and release notes
samloader download -m SM-S9310 -r BRI -v S9310ZHSEDZJ1/S9310OZSEDZJ1/S9310ZCSEDZJ1Samsung's release notes and security patch level for this update: SM-S9310 / BRI on doc.samsungmobile.com. What each part of the build number means: decode S9310ZHSEDZJ1.