S721USQSEDZI1 – Galaxy S24 FE firmware
Build S721USQSEDZI1 is a security update for the Galaxy S24 FE (SM-S721U)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 29, 2026 (method) and has reached
7 regions so far. It keeps bootloader bit 14, so downgrading to the previous build S721USQSEDZH9 is still possible. Samsung still serves this file.
- Model
- SM-S721U
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 14
- First released
- Sep 29, 2026
- Regions
- 7
Rollout timeline by region
The date each region code (CSC) first received S721USQSEDZI1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
AIO | USA (Cricket) | Sep 29, 2026 | day 0 | S721USQSEDZI1/S721UOYNEDZI1/S721USQSEDZI1 |
ATT | USA (AT&T) | Sep 29, 2026 | day 0 | S721USQSEDZI1/S721UOYNEDZI1/S721USQSEDZI1 |
TMB | USA (T-Mobile) | Sep 30, 2026 | +1 day | S721USQSEDZI1/S721UOYNEDZI1/S721USQSEDZI1 |
TMK | USA (MetroPCS) | Sep 30, 2026 | +1 day | S721USQSEDZI1/S721UOYNEDZI1/S721USQSEDZI1 |
USC | USA (US Cellular) | Sep 30, 2026 | +1 day | S721USQSEDZI1/S721UOYNEDZI1/S721USQSEDZI1 |
CCT | USA (Comcast) | Sep 30, 2026 | +1 day | S721USQSEDZI1/S721UOYNEDZI1/S721USQSEDZI1 |
XAA | USA (unlocked) | Oct 1, 2026 | +2 days | S721USQSEDZI1/S721UOYNEDZI1/S721USQSEDZI1 |
Download and release notes
samloader download -m SM-S721U -r XAA -v S721USQSEDZI1/S721UOYNEDZI1/S721USQSEDZI1Samsung's release notes and security patch level for this update: SM-S721U / XAA on doc.samsungmobile.com. What each part of the build number means: decode S721USQSEDZI1.