A546U1UESNFZJ2 – Galaxy A54 5G firmware

Build A546U1UESNFZJ2 is a security update for the Galaxy A54 5G (SM-A546U1) on Android 16 (One UI 8). It first appeared on Samsung's servers on Oct 21, 2026 (method) and has reached 13 regions so far. It keeps bootloader bit 23, so downgrading to the previous build A546U1UESNFZI2 is still possible. Samsung still serves this file.

Model
SM-A546U1
Android
Android 16
Type
Security
Bootloader bit
23
First released
Oct 21, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A546U1UESNFZJ2, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
AIOUSA (Cricket)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
ATTUSA (AT&T)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
CCTUSA (Comcast)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
DSAUSAOct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
DSHUSAOct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
LRAUSA (Bluegrass)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
TMBUSA (T-Mobile)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
TMKUSA (MetroPCS)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
USCUSA (US Cellular)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
VZWUSA (Verizon)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
XAAUSA (unlocked)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2
XARUSA (Cellular South)Oct 21, 2026day 0A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2

Download and release notes

samloader download -m SM-A546U1 -r XAA -v A546U1UESNFZJ2/A546U1OYMNFZJ2/A546U1UESNFZJ2

Samsung's release notes and security patch level for this update: SM-A546U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode A546U1UESNFZJ2.