A546U1UESLFZG3 – Galaxy A54 5G firmware

Build A546U1UESLFZG3 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 Jul 30, 2026 (method) and has reached 13 regions so far. It raises the bootloader bit from 20 to 21: once installed, the device no longer accepts firmware with bit 20 or lower, so a downgrade to A546U1UESKFZF3 is blocked. Samsung still serves this file.

Model
SM-A546U1
Android
Android 16
Type
Security
Bootloader bit
21
First released
Jul 30, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A546U1UESLFZG3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
AIOUSA (Cricket)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
ATTUSA (AT&T)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
CCTUSA (Comcast)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
DSAUSAJul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
DSHUSAJul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
LRAUSA (Bluegrass)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
TMBUSA (T-Mobile)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
TMKUSA (MetroPCS)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
USCUSA (US Cellular)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
VZWUSA (Verizon)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
XAAUSA (unlocked)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3
XARUSA (Cellular South)Jul 30, 2026day 0A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3

Download and release notes

samloader download -m SM-A546U1 -r XAA -v A546U1UESLFZG3/A546U1OYMLFZG3/A546U1UESLFZG3

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 A546U1UESLFZG3.