M546BXXSCEZD3 – Galaxy M54 5G firmware

Build M546BXXSCEZD3 is a security update for the Galaxy M54 5G (SM-M546B) on Android 16 (One UI 8). It first appeared on Samsung's servers on Apr 22, 2026 (method) and has reached 14 regions so far. It keeps bootloader bit 12, so downgrading to the previous build M546BXXSCEZD4 is still possible. Samsung still serves this file.

Model
SM-M546B
Android
Android 16
Type
Security
Bootloader bit
12
First released
Apr 22, 2026
Regions
14

Rollout timeline by region

The date each region code (CSC) first received M546BXXSCEZD3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
MYMMyanmarApr 22, 2026day 0M546BXXSCEZD3/M546BOLMCEZD3/M546BXXSCEZD3
THLThailandApr 22, 2026day 0M546BXXSCEZD3/M546BOLMCEZD3/M546BXXSCEZD3
XMEMalaysiaApr 22, 2026day 0M546BXXSCEZD3/M546BOLMCEZD3/M546BXXSCEZD3
XNZNew ZealandApr 22, 2026day 0M546BXXSCEZD3/M546BOLMCEZD3/M546BXXSCEZD3
XXVVietnamApr 22, 2026day 0M546BXXSCEZD3/M546BOLMCEZD3/M546BXXSCEZD3
ILOIsraelMay 3, 2026+11 daysM546BXXSCEZD3/M546BOJMCEZD3/M546BXXSCEZD3
KSASaudi ArabiaMay 3, 2026+11 daysM546BXXSCEZD3/M546BOJMCEZD3/M546BXXSCEZD3
MIDMiddle EastMay 3, 2026+11 daysM546BXXSCEZD3/M546BOJMCEZD3/M546BXXSCEZD3
MWDMoroccoMay 3, 2026+11 daysM546BXXSCEZD3/M546BOJMCEZD3/M546BXXSCEZD3
XSGUnited Arab EmiratesMay 3, 2026+11 daysM546BXXSCEZD3/M546BOJMCEZD3/M546BXXSCEZD3
CHOChileMay 4, 2026+12 daysM546BXXSCEZD3/M546BOWOCEZD1/M546BXXSCEZD3
COOColombiaMay 4, 2026+12 daysM546BXXSCEZD3/M546BOWOCEZD1/M546BXXSCEZD3
PEOPeruMay 4, 2026+12 daysM546BXXSCEZD3/M546BOWOCEZD1/M546BXXSCEZD3
ZTOBrazilMay 4, 2026+12 daysM546BXXSCEZD3/M546BOWOCEZD1/M546BXXSCEZD3

Download and release notes

samloader download -m SM-M546B -r MYM -v M546BXXSCEZD3/M546BOLMCEZD3/M546BXXSCEZD3

Samsung's release notes and security patch level for this update: SM-M546B / MYM on doc.samsungmobile.com. What each part of the build number means: decode M546BXXSCEZD3.