A546BXXSNFZJ3 – Galaxy A54 5G firmware

Build A546BXXSNFZJ3 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 Oct 18, 2026 (method) and has reached 18 regions so far. It keeps bootloader bit 23, so downgrading to the previous build A546BXXSNFZI1 is still possible. Samsung still serves this file.

Model
SM-A546B
Android
Android 16
Type
Security
Bootloader bit
23
First released
Oct 18, 2026
Regions
18

Rollout timeline by region

The date each region code (CSC) first received A546BXXSNFZJ3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
EUXEurope (Multi-CSC)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
EUYEurope (Multi-CSC)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
BOGFrance (Bouygues)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
BTBUnited Kingdom (BT)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
EVRUnited Kingdom (EE)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
MEOPortugal (MEO)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
MOBAustria (A1)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
MOTSlovenia (Telekom)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
MSRSerbiaOct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
O2CCzech Republic (O2)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
PLSPoland (Plus)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
PRTPoland (Play)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
SFRFrance (SFR)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
SIMSlovenia (A1)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
SWCSwitzerlandOct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
TIMItaly (TIM)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
TOPSerbia/MontenegroOct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1
VIPCroatia (A1)Oct 18, 2026day 0A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1

Download and release notes

samloader download -m SM-A546B -r EUX -v A546BXXSNFZJ3/A546BOXMNFZJ3/A546BXXSNFZJ1

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 A546BXXSNFZJ3.