Samsung Galaxy M34 5G (SM-M346B) Firmware Overview
What is the latest SM-M346B firmware?
M346BXXSEFZH9, released August 27, 2026 with Android 16. It is a security update on bootloader binary 14. The archive holds 50 official builds across 6 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy M34 5G still getting updates?
Yes. The newest build is from August 2026, and 6 of 6 regions already have a build from that month; the rest usually follow within a few weeks.
Can I downgrade the SM-M346B firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 8 to 14:
- Binary 14 — since Aug 2026
- Binary 13 — since Jul 2026
- Binary 12 — since Apr 2026
- Binary 11 — since Feb 2026
- Binary 10 — since Jan 2026
- Binary 9 — since Nov 2025
- Binary 8 — since Sep 2025
A phone already on binary 14 rejects builds with a lower binary in Odin ("SW REV CHECK FAIL"), so it can go back to an earlier Android version only if that version has a binary 14 build. How to read a build number.
All SM-M346B firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
M346BXXSEFZH9
Security update
|
14 | MXD | 16 |
2026-08-27 | Download |
|
M346BXXSEFZH9
Security update
|
14 | ZTO | 16 |
2026-08-27 | Download |
|
M346BXXSEFZH9
Security update
|
14 | CHO | 16 |
2026-08-27 | Download |
|
M346BXXSEFZH9
Security update
|
14 | COO | 16 |
2026-08-27 | Download |
|
M346BXXSEFZH9
Security update
|
14 | SLI | 16 |
2026-08-25 | Download |
|
M346BXXSEFZH9
Security update
|
14 | INS | 16 |
2026-08-25 | Download |
|
M346BXXSDFZG7
Security update
|
13 | INS | 16 |
2026-07-28 | Download |
|
M346BXXSDFZG7
Security update
|
13 | SLI | 16 |
2026-07-28 | Download |
|
M346BXXSDFZG7
Security update
|
13 | ZTO | 16 |
2026-07-25 | Download |
|
M346BXXSDFZG7
Security update
|
13 | CHO | 16 |
2026-07-25 | Download |
|
M346BXXSDFZG7
Security update
|
13 | COO | 16 |
2026-07-25 | Download |
|
M346BXXSDFZG7
Security update
|
13 | MXD | 16 |
2026-07-25 | Download |
|
M346BXXUCFZE6
Feature update
|
12 | INS | 16 |
2026-05-19 | Download |
|
M346BXXUCFZE6
Feature update
|
12 | SLI | 16 |
2026-05-19 | Download |
|
M346BXXUCFZE6
Feature update
|
12 | ZTO | 16 |
2026-05-16 | Download |
|
M346BXXUCFZE6
Feature update
|
12 | CHO | 16 |
2026-05-16 | Download |
|
M346BXXUCFZE6
Feature update
|
12 | COO | 16 |
2026-05-16 | Download |
|
M346BXXUCFZE6
Feature update
|
12 | MXD | 16 |
2026-05-16 | Download |
|
M346BXXSCEZD8
Security update
|
12 | CHO | 16 |
2026-05-11 | Download |
|
M346BXXSCEZD8
Security update
|
12 | ZTO | 16 |
2026-05-11 | Download |
|
M346BXXSCEZD8
Security update
|
12 | MXD | 16 |
2026-05-11 | Download |
|
M346BXXSCEZD8
Security update
|
12 | COO | 16 |
2026-05-11 | Download |
|
M346BXXSCEZD8
Security update
|
12 | SLI | 16 |
2026-05-05 | Download |
|
M346BXXSCEZD8
Security update
|
12 | INS | 16 |
2026-05-05 | Download |
|
M346BXXSBEZB3
Security update
|
11 | MXD | 16 |
2026-03-17 | Download |
|
M346BXXSBEZB3
Security update
|
11 | ZTO | 16 |
2026-03-17 | Download |
|
M346BXXSBEZB3
Security update
|
11 | COO | 16 |
2026-03-17 | Download |
|
M346BXXSBEZB3
Security update
|
11 | CHO | 16 |
2026-03-17 | Download |
|
M346BXXSBEZB3
Security update
|
11 | SLI | 16 |
2026-03-12 | Download |
|
M346BXXSBEZB3
Security update
|
11 | INS | 16 |
2026-03-12 | Download |
|
M346BXXSAEZA2
Security update
|
10 | COO | 16 |
2026-02-10 | Download |
|
M346BXXSAEZA2
Security update
|
10 | CHO | 16 |
2026-02-10 | Download |
|
M346BXXSAEZA2
Security update
|
10 | ZTO | 16 |
2026-02-10 | Download |
|
M346BXXSAEZA2
Security update
|
10 | MXD | 16 |
2026-02-10 | Download |
|
M346BXXSAEZA2
Security update
|
10 | SLI | 16 |
2026-02-04 | Download |
|
M346BXXSAEZA2
Security update
|
10 | INS | 16 |
2026-02-04 | Download |
|
M346BXXS9EYK1
Security update
|
9 | MXD | 16 |
2025-12-29 | Download |
|
M346BXXS9EYK1
Security update
|
9 | COO | 16 |
2025-12-29 | Download |
|
M346BXXS9EYK1
Security update
|
9 | ZTO | 16 |
2025-12-29 | Download |
|
M346BXXS9EYK1
Security update
|
9 | CHO | 16 |
2025-12-29 | Download |
|
M346BXXS9EYK1
Security update
|
9 | INS | 16 |
2025-12-22 | Download |
|
M346BXXS9EYK1
Security update
|
9 | SLI | 16 |
2025-12-22 | Download |
|
M346BXXS8EYJ2
Security update
|
8 | CHO | 16 |
2025-11-11 | Download |
|
M346BXXS8EYJ2
Security update
|
8 | MXD | 16 |
2025-11-04 | Download |
|
M346BXXS8EYJ2
Security update
|
8 | COO | 16 |
2025-11-04 | Download |
|
M346BXXS8EYJ2
Security update
|
8 | ZTO | 16 |
2025-11-04 | Download |
|
M346BXXS8EYJ2
Security update
|
8 | SLI | 16 |
2025-11-03 | Download |
|
M346BXXS8EYJ2
Security update
|
8 | INS | 16 |
2025-10-30 | Download |
|
M346BXXU8EYI8
Feature update
|
8 | SLI | 16 |
2025-10-16 | Download |
|
M346BXXU8EYI8
Feature update
|
8 | INS | 16 |
2025-10-13 | Download |
Latest SM-M346B Firmware by Region
The newest build for each region (CSC) code. Not sure which region your phone uses? See the CSC code guide.
| Region | Latest build | Bit | Android | Date |
|---|---|---|---|---|
| CHO | M346BXXSEFZH9 | 14 | 16 | 2026-08-27 |
| COO | M346BXXSEFZH9 | 14 | 16 | 2026-08-27 |
| INS | M346BXXSEFZH9 | 14 | 16 | 2026-08-25 |
| MXD | M346BXXSEFZH9 | 14 | 16 | 2026-08-27 |
| SLI | M346BXXSEFZH9 | 14 | 16 | 2026-08-25 |
| ZTO | M346BXXSEFZH9 | 14 | 16 | 2026-08-27 |
How to Flash SM-M346B Firmware
Put the Samsung Galaxy M34 5G into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with Bit 14 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.