A546BXXSNFZI1 – Galaxy A54 5G firmware

Build A546BXXSNFZI1 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 Sep 23, 2026 (method) and has reached 18 regions so far. It raises the bootloader bit from 22 to 23: once installed, the device no longer accepts firmware with bit 22 or lower, so a downgrade to A546BXXSMFZH5 is blocked. Samsung still serves this file.

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

Rollout timeline by region

The date each region code (CSC) first received A546BXXSNFZI1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BOGFrance (Bouygues)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
BTBUnited Kingdom (BT)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
EVRUnited Kingdom (EE)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
MEOPortugal (MEO)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
MOBAustria (A1)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
MOTSlovenia (Telekom)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
MSRSerbiaSep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
O2CCzech Republic (O2)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
PLSPoland (Plus)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
PRTPoland (Play)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
SFRFrance (SFR)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
SIMSlovenia (A1)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
SWCSwitzerlandSep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
TIMItaly (TIM)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
TOPSerbia/MontenegroSep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
VIPCroatia (A1)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
EUXEurope (Multi-CSC)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1
EUYEurope (Multi-CSC)Sep 23, 2026day 0A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1

Download and release notes

samloader download -m SM-A546B -r EUX -v A546BXXSNFZI1/A546BOXMNFZI1/A546BXXSNFZI1

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 A546BXXSNFZI1.