Galaxy A16 5G SM-A166M firmware
The latest stable build is A166MUBUAEZJ5 (Android 17, feature update), first released on Oct 27, 2026 – 10 days ago. Samsung has published 24 stable builds for this model since Oct 3, 2024: 17 security and 7 feature updates, from Android 14 to Android 17. The current bootloader (binary) version is 10. A device on bit 10 only accepts firmware with bit 10 or higher – see downgrading and the bootloader bit.
- Latest build
A166MUBUAEZJ5- Released
- Oct 27, 2026
- Android
- Android 17
- Bootloader bit
- 10
- Regions
- 35
- Stable builds
- 24
Latest firmware by region (CSC)
Samsung builds firmware per region code (CSC). Pick the code that matches your device – it is shown under Settings › About phone › Software information › Service provider software version. Follow a code for its complete history.
| CSC | Region | Latest build | Android | Released | Builds |
|---|---|---|---|---|---|
ARO | Argentina | A166MUBSADZH1 | Android 16 | Sep 8, 2026 | 18 |
CDR | Dominican Republic | A166MUBSADZJA | Android 16 | Oct 14, 2026 | 22 |
CGU | Guatemala (Claro) | A166MUBUAEZJ5 | Android 17 | Oct 30, 2026 | 17 |
CHE | Chile (Entel) | A166MUBSADZJA | Android 16 | Oct 27, 2026 | 19 |
CHL | Chile (Claro) | A166MUBSADZJA | Android 16 | Oct 27, 2026 | 19 |
CHO | Chile | A166MUBSADZJA | Android 16 | Oct 27, 2026 | 19 |
CHT | Chile (Movistar) | A166MUBSADZJA | Android 16 | Oct 27, 2026 | 19 |
CHX | Chile | A166MUBSADZJA | Android 16 | Oct 27, 2026 | 19 |
COB | Colombia (Movistar) | A166MUBUAEZJ5 | Android 17 | Nov 3, 2026 | 18 |
COL | Colombia | A166MUBUAEZJ5 | Android 17 | Nov 3, 2026 | 18 |
COM | Colombia (Claro) | A166MUBSADZJA | Android 16 | Oct 19, 2026 | 22 |
COO | Colombia | A166MUBUAEZJ5 | Android 17 | Nov 3, 2026 | 18 |
CRC | Costa Rica | A166MUBSADZH1 | Android 16 | Sep 14, 2026 | 18 |
CTI | Argentina (Claro) | A166MUBSADZH1 | Android 16 | Sep 8, 2026 | 18 |
DOR | Dominican Republic | A166MUBSADZH1 | Android 16 | Sep 14, 2026 | 18 |
GLO | Nigeria (Glo) | A166MUBSADZH1 | Android 16 | Sep 14, 2026 | 18 |
GTO | Guatemala | A166MUBUAEZJ5 | Android 17 | Oct 27, 2026 | 18 |
IUS | Mexico (AT&T) | A166MUBSADZJA | Android 16 | Oct 14, 2026 | 22 |
MXO | Mexico | A166MUBSADZJA | Android 16 | Oct 14, 2026 | 22 |
PEO | Peru | A166MUBSADZH1 | Android 16 | Sep 14, 2026 | 18 |
PET | Peru (Movistar) | A166MUBSADZH1 | Android 16 | Sep 14, 2026 | 18 |
PGU | Guatemala | A166MUBSADZH1 | Android 16 | Sep 8, 2026 | 18 |
PNT | Panama | A166MUBSADZH1 | Android 16 | Sep 14, 2026 | 18 |
PSN | Argentina (Personal) | A166MUBSADZH1 | Android 16 | Sep 8, 2026 | 18 |
SAM | Oceania | A166MUBSADZH1 | Android 16 | Sep 14, 2026 | 18 |
TCE | Mexico (Telcel) | A166MUBSADZJA | Android 16 | Oct 14, 2026 | 22 |
TMM | Myanmar | A166MUBSADZJA | Android 16 | Oct 14, 2026 | 22 |
TPA | Panama | A166MUBUAEZJ5 | Android 17 | Oct 28, 2026 | 19 |
UFN | Argentina (Movistar) | A166MUBSADZH1 | Android 16 | Sep 8, 2026 | 18 |
UPO | Uruguay | A166MUBS4BYG1 | Android 15 | Jul 25, 2025 | 7 |
UYO | Uruguay | A166MUBSADZH1 | Android 16 | Sep 8, 2026 | 18 |
ZTA | Brazil (Claro) | A166MUBUAEZJ5 | Android 17 | Oct 29, 2026 | 23 |
ZTM | Brazil (TIM) | A166MUBUAEZJ5 | Android 17 | Oct 29, 2026 | 23 |
ZTO | Brazil | A166MUBUAEZJ5 | Android 17 | Oct 29, 2026 | 23 |
ZVV | Brazil (Vivo) | A166MUBUAEZJ5 | Android 17 | Oct 29, 2026 | 23 |
Firmware history (24 builds)
Every stable build (PDA version) Samsung has published for the SM-A166M, newest first. “” is the earliest date the build appeared on Samsung's servers in any region. “” means Samsung no longer serves the file for that build.
| Build (PDA) | Released | Android | Type | Bit | Regions | File |
|---|---|---|---|---|---|---|
A166MUBUAEZJ5 | Oct 27, 2026 | Android 17 | Feature | 10 | 10 | on server |
A166MUBSADZJA | Oct 14, 2026 | Android 16 | Security | 10 | 15 | on server |
A166MUBSADZH1 | Sep 8, 2026 | Android 16 | Security | 10 | 34 | on server |
A166MUBS9DZGA | Jul 27, 2026 | Android 16 | Security | 9 | 34 | on server |
A166MUBU8DZE9 | Jun 8, 2026 | Android 16 | Feature | 8 | 34 | on server |
A166MUBS8CZDG | May 12, 2026 | Android 16 | Security | 8 | 34 | on server |
A166MUBS8CZDC | Apr 23, 2026 | Android 16 | Security | 8 | 10 | on server |
A166MUBS8CZB6 | Mar 9, 2026 | Android 16 | Security | 8 | 34 | on server |
A166MUBS7CZA8 | Feb 3, 2026 | Android 16 | Security | 7 | 34 | on server |
A166MUBS6CYL1 | Dec 29, 2025 | Android 16 | Security | 6 | 34 | on server |
A166MUBS5CYKA | Dec 16, 2025 | Android 16 | Security | 5 | 10 | on server |
A166MUBS5CYJ1 | Oct 28, 2025 | Android 16 | Security | 5 | 34 | on server |
A166MUBU5CYI8 | Oct 8, 2025 | Android 16 | Feature | 5 | 34 | on server |
A166MUBS5BYI4 | Oct 7, 2025 | Android 15 | Security | 5 | 10 | on server |
A166MUBS5BYH3 | Sep 3, 2025 | Android 15 | Security | 5 | 34 | on server |
A166MUBS4BYG1 | Jul 24, 2025 | Android 15 | Security | 4 | 35 | on server |
A166MUBU3BYEC | Jun 12, 2025 | Android 15 | Feature | 3 | 35 | on server |
A166MUBS3AYD5 | May 19, 2025 | Android 14 | Security | 3 | 28 | on server |
A166MUBS3AYC1 | Mar 25, 2025 | Android 14 | Security | 3 | 35 | on server |
A166MUBS3AYA2 | Jan 28, 2025 | Android 14 | Security | 3 | 34 | on server |
A166MUBU3AXL1 | Dec 12, 2024 | Android 14 | Feature | 3 | 35 | on server |
A166MUBS2AXJ1 | Oct 29, 2024 | Android 14 | Security | 2 | 35 | on server |
A166MUBU1AXI6 | Oct 7, 2024 | Android 14 | Feature | 1 | 1 | on server |
A166MUBU1AXI8 | Oct 3, 2024 | Android 14 | Feature | 1 | 35 | on server |
How to download SM-A166M firmware
We do not host firmware. Download it directly from Samsung's servers with a free open-source tool, for example samloader:
samloader download -m SM-A166M -r ZVVReplace ZVV with your region code. Step-by-step instructions, including a graphical alternative:
How to download Samsung firmware.
Changelog and security patch level
Samsung publishes the release notes for each update, including the security patch level, on its own site. They are listed per region – for example SM-A166M / ZVV release notes on doc.samsungmobile.com. Each region page here links to the notes for that code.