Samsung Galaxy M56 5G (SM-M566B) Firmware Overview
What is the latest SM-M566B firmware?
M566BXXU7DZJ1, released October 6, 2026 with Android 17. It is a feature update on bootloader binary 7. The archive holds 10 official builds across 1 region (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy M56 5G still getting updates?
Yes. The newest build is from October 2026.
Which Android versions did it get?
The SM-M566B builds in the archive run Android 15 to 17. The earliest build we have for each version:
- Android 17: M566BXXU7DZJ1 (Oct 2026), 1 build in total
- Android 16: M566BXXU3BYI6 (Sep 2025), 6 builds in total
- Android 15: M566BXXU1AYCA (Mar 2025), 3 builds in total
Can I downgrade the SM-M566B firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 1 to 7:
- Binary 7 — since Sep 2026
- Binary 6 — since Aug 2026
- Binary 5 — since Feb 2026
- Binary 4 — since Nov 2025
- Binary 3 — since Aug 2025
- Binary 2 — since May 2025
- Binary 1 — since Mar 2025
A phone already on binary 7 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 7 build. How to read a build number.
All SM-M566B firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
M566BXXU7DZJ1
Feature update
|
7 | INS | 17 |
2026-10-06 | Download |
|
M566BXXS7CZI1
Security update
|
7 | INS | 16 |
2026-09-05 | Download |
|
M566BXXS6CZH4
Security update
|
6 | INS | 16 |
2026-08-26 | Download |
|
M566BXXU5CZE2
Feature update
|
5 | INS | 16 |
2026-05-12 | Download |
|
M566BXXU5BZB4
Feature update
|
5 | INS | 16 |
2026-03-03 | Download |
|
M566BXXS4BYK2
Security update
|
4 | INS | 16 |
2025-11-17 | Download |
|
M566BXXU3BYI6
Feature update
|
3 | INS | 16 |
2025-09-22 | Download |
|
M566BXXS3AYH1
Security update
|
3 | INS | 15 |
2025-08-05 | Download |
|
M566BXXU2AYE4
Feature update
|
2 | INS | 15 |
2025-05-12 | Download |
|
M566BXXU1AYCA
Feature update
|
1 | INS | 15 |
2025-03-27 | Download |
How to Flash SM-M566B Firmware
Put the Samsung Galaxy M56 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 7 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.