S721U1UESEDZI1 – Galaxy S24 FE firmware

Build S721U1UESEDZI1 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 Oct 4, 2026 (method) and has reached 14 regions so far. It keeps bootloader bit 14, so downgrading to the previous build S721U1UESEDZH9 is still possible. Samsung still serves this file.

Model
SM-S721U1
Android
Android 16
Type
Security
Bootloader bit
14
First released
Oct 4, 2026
Regions
14

Rollout timeline by region

The date each region code (CSC) first received S721U1UESEDZI1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
AIOUSA (Cricket)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
ATTUSA (AT&T)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
CCTUSA (Comcast)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
DSAUSAOct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
DSHUSAOct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
LRAUSA (Bluegrass)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
TFNUSA (TracFone)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
TMBUSA (T-Mobile)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
TMKUSA (MetroPCS)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
USCUSA (US Cellular)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
VZWUSA (Verizon)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
XAAUSA (unlocked)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1
XARUSA (Cellular South)Oct 4, 2026day 0S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1

Download and release notes

samloader download -m SM-S721U1 -r XAA -v S721U1UESEDZI1/S721U1OYMEDZI1/S721U1UESEDZI1

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 S721U1UESEDZI1.