M546BXXSFFZH3 – Galaxy M54 5G firmware
Build M546BXXSFFZH3 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 Sep 7, 2026 (method) and has reached
15 regions so far. It raises the bootloader bit from 14 to 15: once installed, the device no longer accepts firmware with bit 14 or lower, so a downgrade to M546BXXSEFZG3 is blocked. Samsung still serves this file.
- Model
- SM-M546B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 15
- First released
- Sep 7, 2026
- Regions
- 15
Rollout timeline by region
The date each region code (CSC) first received M546BXXSFFZH3, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
XID | Indonesia | Sep 7, 2026 | day 0 | M546BXXSFFZH3/M546BOLEFFZH3/M546BXXSFFZH3 |
MYM | Myanmar | Sep 7, 2026 | day 0 | M546BXXSFFZH3/M546BOLMFFZH3/M546BXXSFFZH3 |
THL | Thailand | Sep 7, 2026 | day 0 | M546BXXSFFZH3/M546BOLMFFZH3/M546BXXSFFZH3 |
XME | Malaysia | Sep 7, 2026 | day 0 | M546BXXSFFZH3/M546BOLMFFZH3/M546BXXSFFZH3 |
XNZ | New Zealand | Sep 7, 2026 | day 0 | M546BXXSFFZH3/M546BOLMFFZH3/M546BXXSFFZH3 |
XXV | Vietnam | Sep 7, 2026 | day 0 | M546BXXSFFZH3/M546BOLMFFZH3/M546BXXSFFZH3 |
ILO | Israel | Sep 9, 2026 | +2 days | M546BXXSFFZH3/M546BOJMFFZH3/M546BXXSFFZH3 |
KSA | Saudi Arabia | Sep 9, 2026 | +2 days | M546BXXSFFZH3/M546BOJMFFZH3/M546BXXSFFZH3 |
MID | Middle East | Sep 9, 2026 | +2 days | M546BXXSFFZH3/M546BOJMFFZH3/M546BXXSFFZH3 |
MWD | Morocco | Sep 9, 2026 | +2 days | M546BXXSFFZH3/M546BOJMFFZH3/M546BXXSFFZH3 |
XSG | United Arab Emirates | Sep 9, 2026 | +2 days | M546BXXSFFZH3/M546BOJMFFZH3/M546BXXSFFZH3 |
CHO | Chile | Sep 14, 2026 | +7 days | M546BXXSFFZH3/M546BOWOFFZH3/M546BXXSFFZH3 |
COO | Colombia | Sep 14, 2026 | +7 days | M546BXXSFFZH3/M546BOWOFFZH3/M546BXXSFFZH3 |
PEO | Peru | Sep 14, 2026 | +7 days | M546BXXSFFZH3/M546BOWOFFZH3/M546BXXSFFZH3 |
ZTO | Brazil | Sep 14, 2026 | +7 days | M546BXXSFFZH3/M546BOWOFFZH3/M546BXXSFFZH3 |
Download and release notes
samloader download -m SM-M546B -r XID -v M546BXXSFFZH3/M546BOLEFFZH3/M546BXXSFFZH3Samsung'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 M546BXXSFFZH3.