A546USQSLFZG3 – Galaxy A54 5G firmware

Build A546USQSLFZG3 is a security update for the Galaxy A54 5G (SM-A546U) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jul 27, 2026 (method) and has reached 8 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 A546USQSKFZF3 is blocked. Samsung still serves this file.

Model
SM-A546U
Android
Android 16
Type
Security
Bootloader bit
21
First released
Jul 27, 2026
Regions
8

Rollout timeline by region

The date each region code (CSC) first received A546USQSLFZG3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
AIOUSA (Cricket)Jul 27, 2026day 0A546USQSLFZG3/A546UOYNLFZG3/A546USQSLFZG3
ATTUSA (AT&T)Jul 27, 2026day 0A546USQSLFZG3/A546UOYNLFZG3/A546USQSLFZG3
TMBUSA (T-Mobile)Jul 29, 2026+2 daysA546USQSLFZG3/A546UOYNLFZG3/A546USQSLFZG3
TMKUSA (MetroPCS)Jul 29, 2026+2 daysA546USQSLFZG3/A546UOYNLFZG3/A546USQSLFZG3
DSAUSAJul 30, 2026+3 daysA546USQSLFZG3/A546UOYNLFZG3/A546USQSLFZG3
DSHUSAJul 30, 2026+3 daysA546USQSLFZG3/A546UOYNLFZG3/A546USQSLFZG3
USCUSA (US Cellular)Aug 2, 2026+6 daysA546USQSLFZG3/A546UOYNLFZG3/A546USQSLFZG3
CCTUSA (Comcast)Aug 6, 2026+10 daysA546USQSLFZG3/A546UOYNLFZG3/A546USQSLFZG3

Download and release notes

samloader download -m SM-A546U -r AIO -v A546USQSLFZG3/A546UOYNLFZG3/A546USQSLFZG3

Samsung's release notes and security patch level for this update: SM-A546U / AIO on doc.samsungmobile.com. What each part of the build number means: decode A546USQSLFZG3.