Samsung Galaxy A16 5G (SM-A166M) Firmware Overview
What is the latest SM-A166M firmware?
A166MUBUAEZJ5, released October 9, 2026 with Android 17. It is a feature update on bootloader binary 10. The archive holds 20 official builds across 16 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy A16 5G still getting updates?
Yes. The newest build is from October 2026, and 16 of 16 regions already have a build from that month; the rest usually follow within a few weeks.
Which Android versions did it get?
The SM-A166M builds in the archive run Android 16 to 17. The earliest build we have for each version:
- Android 17: A166MUBUAEZJ5 (Oct 2026), 7 builds in total
- Android 16: A166MUBSADZJA (Oct 2026), 13 builds in total
Can I downgrade the SM-A166M firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. All decodable builds in the archive share binary 10:
- Binary 10 — since Oct 2026
All SM-A166M firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
A166MUBUAEZJ5
Feature update
|
10 | GTO | 17 |
2026-10-09 | Download |
|
A166MUBUAEZJ5
Feature update
|
10 | CGU | 17 |
2026-10-09 | Download |
|
A166MUBUAEZJ5
Feature update
|
10 | ZVV | 17 |
2026-10-09 | Download |
|
A166MUBUAEZJ5
Feature update
|
10 | ZTA | 17 |
2026-10-09 | Download |
|
A166MUBUAEZJ5
Feature update
|
10 | ZTO | 17 |
2026-10-09 | Download |
|
A166MUBUAEZJ5
Feature update
|
10 | TPA | 17 |
2026-10-09 | Download |
|
A166MUBUAEZJ5
Feature update
|
10 | ZTM | 17 |
2026-10-09 | Download |
|
A166MUBSADZJA
Security update
|
10 | ZTM | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | IUS | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | TCE | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | ZTO | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | MXO | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | CDR | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | TMM | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | ZVV | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | CHL | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | ZTA | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | CHT | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | CHX | 16 |
2026-10-01 | Download |
|
A166MUBSADZJA
Security update
|
10 | CHE | 16 |
2026-10-01 | Download |
Latest SM-A166M 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 |
|---|---|---|---|---|
| CDR | A166MUBSADZJA | 10 | 16 | 2026-10-01 |
| CGU | A166MUBUAEZJ5 | 10 | 17 | 2026-10-09 |
| CHE | A166MUBSADZJA | 10 | 16 | 2026-10-01 |
| CHL | A166MUBSADZJA | 10 | 16 | 2026-10-01 |
| CHT | A166MUBSADZJA | 10 | 16 | 2026-10-01 |
| CHX | A166MUBSADZJA | 10 | 16 | 2026-10-01 |
| GTO | A166MUBUAEZJ5 | 10 | 17 | 2026-10-09 |
| IUS | A166MUBSADZJA | 10 | 16 | 2026-10-01 |
| MXO | A166MUBSADZJA | 10 | 16 | 2026-10-01 |
| TCE | A166MUBSADZJA | 10 | 16 | 2026-10-01 |
| TMM | A166MUBSADZJA | 10 | 16 | 2026-10-01 |
| TPA | A166MUBUAEZJ5 | 10 | 17 | 2026-10-09 |
| ZTA | A166MUBUAEZJ5 | 10 | 17 | 2026-10-09 |
| ZTM | A166MUBUAEZJ5 | 10 | 17 | 2026-10-09 |
| ZTO | A166MUBUAEZJ5 | 10 | 17 | 2026-10-09 |
| ZVV | A166MUBUAEZJ5 | 10 | 17 | 2026-10-09 |
How to Flash SM-A166M Firmware
Put the Samsung Galaxy A16 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 10 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.