F731USQS8GZE8 – Galaxy Z Flip5 firmware
Build F731USQS8GZE8 is a security update for the Galaxy Z Flip5 (SM-F731U)
on Android 16 (One UI 8). It first appeared on Samsung's servers on May 28, 2026 (method) and has reached
7 regions so far. It raises the bootloader bit from 7 to 8: once installed, the device no longer accepts firmware with bit 7 or lower, so a downgrade to F731USQU7GZE4 is blocked. Samsung still serves this file.
- Model
- SM-F731U
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 8
- First released
- May 28, 2026
- Regions
- 7
Rollout timeline by region
The date each region code (CSC) first received F731USQS8GZE8, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
ATT | USA (AT&T) | May 28, 2026 | day 0 | F731USQS8GZE8/F731UOYN8GZE8/F731USQS8GZE8 |
VZW | USA (Verizon) | May 31, 2026 | +3 days | F731USQS8GZE8/F731UOYN8GZE8/F731USQS8GZE8 |
TMK | USA (MetroPCS) | May 31, 2026 | +3 days | F731USQS8GZE8/F731UOYN8GZE8/F731USQS8GZE8 |
TMB | USA (T-Mobile) | May 31, 2026 | +3 days | F731USQS8GZE8/F731UOYN8GZE8/F731USQS8GZE8 |
XAA | USA (unlocked) | May 31, 2026 | +3 days | F731USQS8GZE8/F731UOYN8GZE8/F731USQS8GZE8 |
CCT | USA (Comcast) | Jun 1, 2026 | +4 days | F731USQS8GZE8/F731UOYN8GZE8/F731USQS8GZE8 |
USC | USA (US Cellular) | Jun 9, 2026 | +12 days | F731USQS8GZE8/F731UOYN8GZE8/F731USQS8GZE8 |
Download and release notes
samloader download -m SM-F731U -r XAA -v F731USQS8GZE8/F731UOYN8GZE8/F731USQS8GZE8Samsung's release notes and security patch level for this update: SM-F731U / XAA on doc.samsungmobile.com. What each part of the build number means: decode F731USQS8GZE8.