M546BXXSEFZG3 – Galaxy M54 5G firmware
Build M546BXXSEFZG3 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 Jul 27, 2026 (method) and has reached
15 regions so far. It raises the bootloader bit from 13 to 14: once installed, the device no longer accepts firmware with bit 13 or lower, so a downgrade to M546BXXSDFZF1 is blocked. Samsung still serves this file.
- Model
- SM-M546B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 14
- First released
- Jul 27, 2026
- Regions
- 15
Rollout timeline by region
The date each region code (CSC) first received M546BXXSEFZG3, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
XXV | Vietnam | Jul 27, 2026 | day 0 | M546BXXSEFZG3/M546BOLMEFZG3/M546BXXSEFZG3 |
MYM | Myanmar | Jul 27, 2026 | day 0 | M546BXXSEFZG3/M546BOLMEFZG3/M546BXXSEFZG3 |
THL | Thailand | Jul 27, 2026 | day 0 | M546BXXSEFZG3/M546BOLMEFZG3/M546BXXSEFZG3 |
XNZ | New Zealand | Jul 27, 2026 | day 0 | M546BXXSEFZG3/M546BOLMEFZG3/M546BXXSEFZG3 |
XME | Malaysia | Jul 27, 2026 | day 0 | M546BXXSEFZG3/M546BOLMEFZG3/M546BXXSEFZG3 |
XID | Indonesia | Jul 27, 2026 | day 0 | M546BXXSEFZG3/M546BOLEEFZG3/M546BXXSEFZG3 |
ILO | Israel | Jul 29, 2026 | +2 days | M546BXXSEFZG3/M546BOJMEFZG3/M546BXXSEFZG3 |
KSA | Saudi Arabia | Jul 29, 2026 | +2 days | M546BXXSEFZG3/M546BOJMEFZG3/M546BXXSEFZG3 |
MID | Middle East | Jul 29, 2026 | +2 days | M546BXXSEFZG3/M546BOJMEFZG3/M546BXXSEFZG3 |
MWD | Morocco | Jul 29, 2026 | +2 days | M546BXXSEFZG3/M546BOJMEFZG3/M546BXXSEFZG3 |
XSG | United Arab Emirates | Jul 29, 2026 | +2 days | M546BXXSEFZG3/M546BOJMEFZG3/M546BXXSEFZG3 |
COO | Colombia | Jul 30, 2026 | +3 days | M546BXXSEFZG3/M546BOWOEFZG3/M546BXXSEFZG3 |
PEO | Peru | Jul 30, 2026 | +3 days | M546BXXSEFZG3/M546BOWOEFZG3/M546BXXSEFZG3 |
ZTO | Brazil | Jul 30, 2026 | +3 days | M546BXXSEFZG3/M546BOWOEFZG3/M546BXXSEFZG3 |
CHO | Chile | Aug 4, 2026 | +8 days | M546BXXSEFZG3/M546BOWOEFZG3/M546BXXSEFZG3 |
Download and release notes
samloader download -m SM-M546B -r XXV -v M546BXXSEFZG3/M546BOLMEFZG3/M546BXXSEFZG3Samsung's release notes and security patch level for this update: SM-M546B / XXV on doc.samsungmobile.com. What each part of the build number means: decode M546BXXSEFZG3.