S721U1UESEDZH9 – Galaxy S24 FE firmware
Build S721U1UESEDZH9 is a security update for the Galaxy S24 FE (SM-S721U1)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 1, 2026 (method) and has reached
14 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 S721U1UESDDZG1 is blocked. Samsung still serves this file.
- Model
- SM-S721U1
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 14
- First released
- Sep 1, 2026
- Regions
- 14
Rollout timeline by region
The date each region code (CSC) first received S721U1UESEDZH9, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
ACG | USA (C Spire) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
AIO | USA (Cricket) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
ATT | USA (AT&T) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
CCT | USA (Comcast) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
DSA | USA | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
DSH | USA | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
LRA | USA (Bluegrass) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
TFN | USA (TracFone) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
TMB | USA (T-Mobile) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
TMK | USA (MetroPCS) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
USC | USA (US Cellular) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
VZW | USA (Verizon) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
XAA | USA (unlocked) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
XAR | USA (Cellular South) | Sep 1, 2026 | day 0 | S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9 |
Download and release notes
samloader download -m SM-S721U1 -r XAA -v S721U1UESEDZH9/S721U1OYMEDZH9/S721U1UESEDZH9Samsung's release notes and security patch level for this update: SM-S721U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode S721U1UESEDZH9.