M546BXXSDFZF1 – Galaxy M54 5G firmware

Build M546BXXSDFZF1 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 Jun 28, 2026 (method) and has reached 1 region so far. It raises the bootloader bit from 12 to 13: once installed, the device no longer accepts firmware with bit 12 or lower, so a downgrade to M546BXXUCFZE5 is blocked. Samsung still serves this file.

Model

SM-M546B

Android

Android 16

Type

Security

Bootloader bit

13

First released

Jun 28, 2026

Regions

1

Rollout timeline by region

The date each region code (CSC) first received M546BXXSDFZF1, counted from the first release.

Download and release notes

samloader download -m SM-M546B -r XID -v M546BXXSDFZF1/M546BOLEDFZF1/M546BXXSDFZF1

Samsung's release notes and security patch level for this update: SM-M546B / XID on doc.samsungmobile.com. What each part of the build number means: decode M546BXXSDFZF1.