A546BXXSLFZG3 – Galaxy A54 5G firmware

Build A546BXXSLFZG3 is a security update for the Galaxy A54 5G (SM-A546B) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jul 26, 2026 (method) and has reached 18 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 A546BXXSKFZF3 is blocked. Samsung still serves this file.

Model
SM-A546B
Android
Android 16
Type
Security
Bootloader bit
21
First released
Jul 26, 2026
Regions
18

Rollout timeline by region

The date each region code (CSC) first received A546BXXSLFZG3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BOGFrance (Bouygues)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
BTBUnited Kingdom (BT)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
EUXEurope (Multi-CSC)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
EUYEurope (Multi-CSC)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
EVRUnited Kingdom (EE)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
MEOPortugal (MEO)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
MOBAustria (A1)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
MOTSlovenia (Telekom)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
MSRSerbiaJul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
O2CCzech Republic (O2)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
PLSPoland (Plus)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
PRTPoland (Play)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
SFRFrance (SFR)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
SIMSlovenia (A1)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
SWCSwitzerlandJul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
TIMItaly (TIM)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
TOPSerbia/MontenegroJul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1
VIPCroatia (A1)Jul 26, 2026day 0A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1

Download and release notes

samloader download -m SM-A546B -r EUX -v A546BXXSLFZG3/A546BOXMLFZG3/A546BXXSLFZG1

Samsung's release notes and security patch level for this update: SM-A546B / EUX on doc.samsungmobile.com. What each part of the build number means: decode A546BXXSLFZG3.