Galaxy Buddy4 SM-A166L firmware
The latest stable build is A166LKSU8DZJ5 (Android 17, feature update), first released on Oct 20, 2026 – 17 days ago. Samsung has published 12 stable builds for this model since May 21, 2025: 7 security and 5 feature updates, from Android 15 to Android 17. The current bootloader (binary) version is 8. A device on bit 8 only accepts firmware with bit 8 or higher – see downgrading and the bootloader bit.
- Latest build
A166LKSU8DZJ5- Released
- Oct 20, 2026
- Android
- Android 17
- Bootloader bit
- 8
- Regions
- 1
- Stable builds
- 12
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 |
|---|---|---|---|---|---|
LUC | South Korea (LG U+) | A166LKSU8DZJ5 | Android 17 | Oct 20, 2026 | 12 |
Firmware history (12 builds)
Every stable build (PDA version) Samsung has published for the SM-A166L, 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 |
|---|---|---|---|---|---|---|
A166LKSU8DZJ5 | Oct 20, 2026 | Android 17 | Feature | 8 | 1 | on server |
A166LKSS8CZH1 | Sep 2, 2026 | Android 16 | Security | 8 | 1 | on server |
A166LKSS7CZG1 | Jul 23, 2026 | Android 16 | Security | 7 | 1 | on server |
A166LKSU6CZE9 | May 31, 2026 | Android 16 | Feature | 6 | 1 | on server |
A166LKSS6BZB7 | Mar 4, 2026 | Android 16 | Security | 6 | 1 | on server |
A166LKSS5BZAA | Jan 29, 2026 | Android 16 | Security | 5 | 1 | on server |
A166LKSS4BYL2 | Dec 17, 2025 | Android 16 | Security | 4 | 1 | on server |
A166LKSS4BYK3 | Nov 26, 2025 | Android 16 | Security | 4 | 1 | on server |
A166LKSU3BYI8 | Sep 30, 2025 | Android 16 | Feature | 3 | 1 | on server |
A166LKSS3AYH3 | Aug 18, 2025 | Android 15 | Security | 3 | 1 | on server |
A166LKSU2AYE3 | Jun 15, 2025 | Android 15 | Feature | 2 | 1 | on server |
A166LKSU1AYD3 | May 21, 2025 | Android 15 | Feature | 1 | 1 | on server |
How to download SM-A166L 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-A166L -r LUCReplace LUC 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-A166L / LUC release notes on doc.samsungmobile.com. Each region page here links to the notes for that code.