S166VUDSADZI2 – Galaxy A16 5G firmware
Build S166VUDSADZI2 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 Oct 7, 2026 (method) and has reached
1 region so far. It raises the bootloader bit from 9 to 10: once installed, the device no longer accepts firmware with bit 9 or lower, so a downgrade to S166VUDS9DZH1 is blocked. Samsung still serves this file.
- Model
- SM-S166V
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 10
- First released
- Oct 7, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received S166VUDSADZI2, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
TFN | USA (TracFone) | Oct 7, 2026 | day 0 | S166VUDSADZI2/S166VTFNADZI2/S166VUDSADZI2 |
Download and release notes
samloader download -m SM-S166V -r TFN -v S166VUDSADZI2/S166VTFNADZI2/S166VUDSADZI2Samsung'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 S166VUDSADZI2.