Samsung Galaxy M36 5G (SM-M366B) Firmware Overview
What is the latest SM-M366B firmware?
M366BXXU8CZJ5, released October 9, 2026 with Android 17. It is a feature update on bootloader binary 8. The archive holds 22 official builds across 2 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy M36 5G still getting updates?
Yes. The newest build is from October 2026, and 2 of 2 regions already have a build from that month; the rest usually follow within a few weeks.
Which Android versions did it get?
The SM-M366B builds in the archive run Android 15 to 17. The earliest build we have for each version:
- Android 17: M366BXXU8CZJ5 (Oct 2026), 2 builds in total
- Android 16: M366BXXU2BYI3 (Sep 2025), 15 builds in total
- Android 15: M366BXXU1AYF1 (Jun 2025), 4 builds in total
Can I downgrade the SM-M366B 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 8:
- Binary 8 — since Aug 2026
- Binary 7 — since Jul 2026
- Binary 6 — since Apr 2026
- Binary 5 — since Feb 2026
- Binary 4 — since Jan 2026
- Binary 3 — since Nov 2025
- Binary 2 — since Aug 2025
- Binary 1 — since Jun 2025
A phone already on binary 8 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 8 build. How to read a build number.
All SM-M366B firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
M366BXXU8CZJ5
Feature update
|
8 | INS | 17 |
2026-10-09 | Download |
|
M366BXXU8CZJ5
Feature update
|
8 | NPB | 17 |
2026-10-09 | Download |
|
M366BXXS8BZH3
Security update
|
8 | NPB | 16 |
2026-09-08 | Download |
|
M366BXXS8BZH3
Security update
|
8 | INS | 16 |
2026-09-08 | Download |
|
M366BXXS7BZG6
Security update
|
7 | NPB | 16 |
2026-08-13 | Download |
|
M366BXXS7BZG6
Security update
|
7 | INS | 16 |
2026-08-13 | Download |
|
M366BXXU6BZE3
Feature update
|
6 | NPB | 16 |
2026-05-14 | Download |
|
M366BXXS6BZD5
Security update
|
6 | NPB | 16 |
2026-05-07 | Download |
|
M366BXXS6BZD5
Security update
|
6 | INS | 16 |
2026-05-07 | Download |
|
M366BXXS5BZB3
Security update
|
5 | INS | 16 |
2026-03-17 | Download |
|
M366BXXS5BZB3
Security update
|
5 | NPB | 16 |
2026-03-17 | Download |
|
M366BXXS4BZA3
Security update
|
4 | INS | 16 |
2026-02-09 | Download |
|
M366BXXS4BZA3
Security update
|
4 | NPB | 16 |
2026-02-09 | Download |
|
M366BXXS3BYK1
Security update
|
3 | NPB | 16 |
2025-11-19 | Download |
|
M366BXXS3BYK1
Security update
|
3 | INS | 16 |
2025-11-19 | Download |
|
M366BXXU2BYI3
Feature update
|
2 | NPB | 16 |
2025-09-17 | Download |
|
M366BXXU2BYI3
Feature update
|
2 | INS | 16 |
2025-09-17 | Download |
|
M366BXXS2AYH1
Security update
|
2 | NPB | 15 |
2025-08-05 | Download |
|
M366BXXS2AYH1
Security update
|
2 | INS | 15 |
2025-08-05 | Download |
|
M366BXXU1AYF1
Feature update
|
1 | NPB | 15 |
2025-06-04 | Download |
|
M366BXXU1AYF1
Feature update
|
1 | INS | 15 |
2025-06-04 | Download |
|
M366BXXU6BZE3
Feature update
|
6 | INS | — |
N/A | Download |
Latest SM-M366B 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 |
|---|---|---|---|---|
| INS | M366BXXU8CZJ5 | 8 | 17 | 2026-10-09 |
| NPB | M366BXXU8CZJ5 | 8 | 17 | 2026-10-09 |
How to Flash SM-M366B Firmware
Put the Samsung Galaxy M36 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 8 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.