A166U1UEU7DZEB – Galaxy A16 5G firmware

Build A166U1UEU7DZEB is a feature update for the Galaxy A16 5G (SM-A166U1) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 4, 2026 (method) and has reached 13 regions so far. It keeps bootloader bit 7, so downgrading to the previous build A166U1UES7CZDG is still possible. Samsung still serves this file.

Model
SM-A166U1
Android
Android 16
Type
Feature
Bootloader bit
7
First released
Jun 4, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A166U1UEU7DZEB, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
AIOUSA (Cricket)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
ATTUSA (AT&T)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
CCTUSA (Comcast)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
DSAUSAJun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
DSHUSAJun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
LRAUSA (Bluegrass)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
TMBUSA (T-Mobile)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
TMKUSA (MetroPCS)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
USCUSA (US Cellular)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
VZWUSA (Verizon)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
XAAUSA (unlocked)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB
XARUSA (Cellular South)Jun 4, 2026day 0A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB

Download and release notes

samloader download -m SM-A166U1 -r XAA -v A166U1UEU7DZEB/A166U1OYM7DZEB/A166U1UEU7DZEB

Samsung's release notes and security patch level for this update: SM-A166U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode A166U1UEU7DZEB.