A546BXXSKFZF3 – Galaxy A54 5G firmware

Build A546BXXSKFZF3 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 Jun 28, 2026 (method) and has reached 18 regions so far. It raises the bootloader bit from 19 to 20: once installed, the device no longer accepts firmware with bit 19 or lower, so a downgrade to A546BXXUJFZE9 is blocked. Samsung still serves this file.

Model
SM-A546B
Android
Android 16
Type
Security
Bootloader bit
20
First released
Jun 28, 2026
Regions
18

Rollout timeline by region

The date each region code (CSC) first received A546BXXSKFZF3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BOGFrance (Bouygues)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
BTBUnited Kingdom (BT)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
EUXEurope (Multi-CSC)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
EUYEurope (Multi-CSC)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
EVRUnited Kingdom (EE)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
MEOPortugal (MEO)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
MOBAustria (A1)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
MOTSlovenia (Telekom)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
MSRSerbiaJun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
O2CCzech Republic (O2)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
PLSPoland (Plus)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
PRTPoland (Play)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
SFRFrance (SFR)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
SIMSlovenia (A1)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
SWCSwitzerlandJun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
TIMItaly (TIM)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
TOPSerbia/MontenegroJun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1
VIPCroatia (A1)Jun 28, 2026day 0A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1

Download and release notes

samloader download -m SM-A546B -r EUX -v A546BXXSKFZF3/A546BOXMKFZF3/A546BXXSKFZF1

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 A546BXXSKFZF3.