M346BXXSEFZH9 – Galaxy M34 5G firmware
Build M346BXXSEFZH9 is a security update for the Galaxy M34 5G (SM-M346B)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 9, 2026 (method) and has reached
4 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 M346BXXSDFZG7 is blocked. Samsung still serves this file.
- Model
- SM-M346B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 14
- First released
- Sep 9, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received M346BXXSEFZH9, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
INS | India | Sep 9, 2026 | day 0 | M346BXXSEFZH9/M346BODMEFZH9/M346BXXSEFZH9 |
CHO | Chile | Sep 15, 2026 | +6 days | M346BXXSEFZH9/M346BOWOEFZH9/M346BXXSEFZH9 |
COO | Colombia | Sep 15, 2026 | +6 days | M346BXXSEFZH9/M346BOWOEFZH9/M346BXXSEFZH9 |
ZTO | Brazil | Sep 15, 2026 | +6 days | M346BXXSEFZH9/M346BOWOEFZH9/M346BXXSEFZH9 |
Download and release notes
samloader download -m SM-M346B -r INS -v M346BXXSEFZH9/M346BODMEFZH9/M346BXXSEFZH9Samsung's release notes and security patch level for this update: SM-M346B / INS on doc.samsungmobile.com. What each part of the build number means: decode M346BXXSEFZH9.