M356BXXS6CZA4 – Galaxy M35 5G firmware
Build M356BXXS6CZA4 is a security update for the Galaxy M35 5G (SM-M356B)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jan 27, 2026 (method) and has reached
8 regions so far. It raises the bootloader bit from 5 to 6: once installed, the device no longer accepts firmware with bit 5 or lower, so a downgrade to M356BXXS5CYJ2 is blocked. Samsung still serves this file.
- Model
- SM-M356B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 6
- First released
- Jan 27, 2026
- Regions
- 8
Rollout timeline by region
The date each region code (CSC) first received M356BXXS6CZA4, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
XXV | Vietnam | Jan 27, 2026 | day 0 | M356BXXS6CZA4/M356BOLM6CZA4/M356BXXS6CZA4 |
BKD | Bangladesh | Jan 28, 2026 | +1 day | M356BXXS6CZA4/M356BODM6CZA4/M356BXXS6CZA4 |
INS | India | Jan 28, 2026 | +1 day | M356BXXS6CZA4/M356BODM6CZA4/M356BXXS6CZA4 |
NPB | Nepal | Jan 28, 2026 | +1 day | M356BXXS6CZA4/M356BODM6CZA4/M356BXXS6CZA4 |
SLK | Sri Lanka | Jan 28, 2026 | +1 day | M356BXXS6CZA4/M356BODM6CZA4/M356BXXS6CZA4 |
ZTO | Brazil | Jan 29, 2026 | +2 days | M356BXXS6CZA4/M356BOWO6CZA4/M356BXXS6CZA4 |
EUX | Europe (Multi-CSC) | Feb 1, 2026 | +5 days | M356BXXS6CZA4/M356BOXM6CZA4/M356BXXS6CZA4 |
EUY | Europe (Multi-CSC) | Feb 1, 2026 | +5 days | M356BXXS6CZA4/M356BOXM6CZA4/M356BXXS6CZA4 |
Download and release notes
samloader download -m SM-M356B -r EUX -v M356BXXS6CZA4/M356BOXM6CZA4/M356BXXS6CZA4Samsung's release notes and security patch level for this update: SM-M356B / EUX on doc.samsungmobile.com. What each part of the build number means: decode M356BXXS6CZA4.