Samsung Galaxy M16 5G (SM-M166S) Firmware Overview
What is the latest SM-M166S firmware?
M166SKSU8DZJ5, released October 8, 2026 with Android 17. It is a feature update on bootloader binary 8. The archive holds 11 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 M16 5G still getting updates?
Yes. The newest build is from October 2026.
Which Android versions did it get?
The SM-M166S builds in the archive run Android 15 to 17. The earliest build we have for each version:
- Android 17: M166SKSU8DZJ5 (Oct 2026), 1 build in total
- Android 16: M166SKSU3BYI8 (Sep 2025), 7 builds in total
- Android 15: M166SKSU2AYF2 (Jun 2025), 2 builds in total
Can I downgrade the SM-M166S firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 2 to 8:
- Binary 8 — since Aug 2026
- Binary 7 — since Jul 2026
- Binary 6 — since Feb 2026
- Binary 5 — since Jan 2026
- Binary 4 — since Nov 2025
- Binary 3 — since Aug 2025
- Binary 2 — 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-M166S firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
M166SKSU8DZJ5
Feature update
|
8 | SKC | 17 |
2026-10-08 | Download |
|
M166SKSS8CZH9
Security update
|
8 | SKC | 16 |
2026-08-21 | Download |
|
M166SKSS7CZG1
Security update
|
7 | SKC | 16 |
2026-07-08 | Download |
|
M166SKSS6BZB7
Security update
|
6 | SKC | 16 |
2026-02-14 | Download |
|
M166SKSS5BZAA
Security update
|
5 | SKC | 16 |
2026-01-20 | Download |
|
M166SKSS4BYL1
Security update
|
4 | SKC | 16 |
2025-12-09 | Download |
|
M166SKSS4BYK2
Security update
|
4 | SKC | 16 |
2025-11-10 | Download |
|
M166SKSU3BYI8
Feature update
|
3 | SKC | 16 |
2025-09-23 | Download |
|
M166SKSS3AYH1
Security update
|
3 | SKC | 15 |
2025-07-31 | Download |
|
M166SKSU2AYF2
Feature update
|
2 | SKC | 15 |
2025-06-17 | Download |
|
M166SKSU6CZE9
Feature update
|
6 | SKC | — |
N/A | Download |
How to Flash SM-M166S Firmware
Put the Samsung Galaxy M16 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.