A166WVLSADZI2 – Galaxy A16 5G firmware

Build A166WVLSADZI2 is a security update for the Galaxy A16 5G (SM-A166W) on Android 16 (One UI 8). It first appeared on Samsung's servers on Oct 7, 2026 (method) and has reached 11 regions so far. It raises the bootloader bit from 8 to 10: once installed, the device no longer accepts firmware with bit 8 or lower, so a downgrade to A166WVLS8DZG1 is blocked. Samsung still serves this file.

Model
SM-A166W
Android
Android 16
Type
Security
Bootloader bit
10
First released
Oct 7, 2026
Regions
11

Rollout timeline by region

The date each region code (CSC) first received A166WVLSADZI2, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BMCCanada (Bell)Oct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2
BWACanadaOct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2
ESKCanada (Eastlink)Oct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2
FMCCanada (Fido)Oct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2
GLWCanada (Freedom)Oct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2
KDOCanada (Koodo)Oct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2
RWCCanada (Rogers)Oct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2
TLSCanada (Telus)Oct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2
VMCCanada (Virgin)Oct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2
VTRCanada (Videotron)Oct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2
XACCanadaOct 7, 2026day 0A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2

Download and release notes

samloader download -m SM-A166W -r BMC -v A166WVLSADZI2/A166WOYVADZI2/A166WVLSADZI2

Samsung's release notes and security patch level for this update: SM-A166W / BMC on doc.samsungmobile.com. What each part of the build number means: decode A166WVLSADZI2.