S721USQSDDZG1 – Galaxy S24 FE firmware
Build S721USQSDDZG1 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 Jul 23, 2026 (method) and has reached
8 regions so far. It raises the bootloader bit from 12 to 13: once installed, the device no longer accepts firmware with bit 12 or lower, so a downgrade to S721USQSCDZF3 is blocked. Samsung still serves this file.
- Model
- SM-S721U
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 13
- First released
- Jul 23, 2026
- Regions
- 8
Rollout timeline by region
The date each region code (CSC) first received S721USQSDDZG1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
TMB | USA (T-Mobile) | Jul 23, 2026 | day 0 | S721USQSDDZG1/S721UOYNDDZG1/S721USQSDDZG1 |
TMK | USA (MetroPCS) | Jul 23, 2026 | day 0 | S721USQSDDZG1/S721UOYNDDZG1/S721USQSDDZG1 |
AIO | USA (Cricket) | Jul 26, 2026 | +3 days | S721USQSDDZG1/S721UOYNDDZG1/S721USQSDDZG1 |
ATT | USA (AT&T) | Jul 26, 2026 | +3 days | S721USQSDDZG1/S721UOYNDDZG1/S721USQSDDZG1 |
CCT | USA (Comcast) | Jul 26, 2026 | +3 days | S721USQSDDZG1/S721UOYNDDZG1/S721USQSDDZG1 |
VZW | USA (Verizon) | Jul 27, 2026 | +4 days | S721USQSDDZG1/S721UOYNDDZG1/S721USQSDDZG1 |
USC | USA (US Cellular) | Aug 2, 2026 | +10 days | S721USQSDDZG1/S721UOYNDDZG1/S721USQSDDZG1 |
XAA | USA (unlocked) | Aug 2, 2026 | +10 days | S721USQSDDZG1/S721UOYNDDZG1/S721USQSDDZG1 |
Download and release notes
samloader download -m SM-S721U -r XAA -v S721USQSDDZG1/S721UOYNDDZG1/S721USQSDDZG1Samsung'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 S721USQSDDZG1.