S166VUDS9DZH1 – Galaxy A16 5G firmware
Build S166VUDS9DZH1 is a security update for the Galaxy A16 5G (SM-S166V)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 10, 2026 (method) and has reached
1 region so far. It raises the bootloader bit from 8 to 9: once installed, the device no longer accepts firmware with bit 8 or lower, so a downgrade to S166VUDS8DZG1 is blocked. Samsung still serves this file.
- Model
- SM-S166V
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 9
- First released
- Sep 10, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received S166VUDS9DZH1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
TFN | USA (TracFone) | Sep 10, 2026 | day 0 | S166VUDS9DZH1/S166VTFN9DZH1/S166VUDS9DZH1 |
Download and release notes
samloader download -m SM-S166V -r TFN -v S166VUDS9DZH1/S166VTFN9DZH1/S166VUDS9DZH1Samsung's release notes and security patch level for this update: SM-S166V / TFN on doc.samsungmobile.com. What each part of the build number means: decode S166VUDS9DZH1.