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).
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.