A166LKSU8DZJ5 – Galaxy Buddy4 firmware
Build A166LKSU8DZJ5 is a feature update for the Galaxy Buddy4 (SM-A166L)
on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 20, 2026 (method) and has reached
1 region so far. It keeps bootloader bit 8, so downgrading to the previous build A166LKSS8CZH1 is still possible. Samsung still serves this file.
- Model
- SM-A166L
- Android
- Android 17
- Type
- Feature
- Bootloader bit
- 8
- First released
- Oct 20, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received A166LKSU8DZJ5, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
LUC | South Korea (LG U+) | Oct 20, 2026 | day 0 | A166LKSU8DZJ5/A166LLUC8DZJ5/A166LKLU8DZJ5 |
Download and release notes
samloader download -m SM-A166L -r LUC -v A166LKSU8DZJ5/A166LLUC8DZJ5/A166LKLU8DZJ5Samsung's release notes and security patch level for this update: SM-A166L / LUC on doc.samsungmobile.com. What each part of the build number means: decode A166LKSU8DZJ5.