S721U1UESDDZG1 – Galaxy S24 FE firmware

Build S721U1UESDDZG1 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 Jul 26, 2026 (method) and has reached 14 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 S721U1UESCDZF3 is blocked. Samsung still serves this file.

Model
SM-S721U1
Android
Android 16
Type
Security
Bootloader bit
13
First released
Jul 26, 2026
Regions
14

Rollout timeline by region

The date each region code (CSC) first received S721U1UESDDZG1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
AIOUSA (Cricket)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
ATTUSA (AT&T)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
CCTUSA (Comcast)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
DSAUSAJul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
DSHUSAJul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
LRAUSA (Bluegrass)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
TFNUSA (TracFone)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
TMBUSA (T-Mobile)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
TMKUSA (MetroPCS)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
USCUSA (US Cellular)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
VZWUSA (Verizon)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
XAAUSA (unlocked)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1
XARUSA (Cellular South)Jul 26, 2026day 0S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1

Download and release notes

samloader download -m SM-S721U1 -r XAA -v S721U1UESDDZG1/S721U1OYMDDZG1/S721U1UESDDZG1

Samsung'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 S721U1UESDDZG1.