F731U1UES8GZE8 – Galaxy Z Flip5 firmware
Build F731U1UES8GZE8 is a security update for the Galaxy Z Flip5 (SM-F731U1)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 2, 2026 (method) and has reached
14 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 F731U1UEU7GZE4 is blocked. Samsung still serves this file.
- Model
- SM-F731U1
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 8
- First released
- Jun 2, 2026
- Regions
- 14
Rollout timeline by region
The date each region code (CSC) first received F731U1UES8GZE8, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
ACG | USA (C Spire) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
AIO | USA (Cricket) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
ATT | USA (AT&T) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
CCT | USA (Comcast) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
DSA | USA | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
DSH | USA | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
LRA | USA (Bluegrass) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
TFN | USA (TracFone) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
TMB | USA (T-Mobile) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
TMK | USA (MetroPCS) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
USC | USA (US Cellular) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
VZW | USA (Verizon) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
XAA | USA (unlocked) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
XAR | USA (Cellular South) | Jun 2, 2026 | day 0 | F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8 |
Download and release notes
samloader download -m SM-F731U1 -r XAA -v F731U1UES8GZE8/F731U1OYM8GZE8/F731U1UES8GZE8Samsung's release notes and security patch level for this update: SM-F731U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode F731U1UES8GZE8.