A166USQUAEZJ5 – Galaxy A16 5G firmware

Build A166USQUAEZJ5 is a feature update for the Galaxy A16 5G (SM-A166U) on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 26, 2026 (method) and has reached 9 regions so far. It keeps bootloader bit 10, so downgrading to the previous build A166USQSADZI2 is still possible. Samsung still serves this file.

Model
SM-A166U
Android
Android 17
Type
Feature
Bootloader bit
10
First released
Oct 26, 2026
Regions
9

Rollout timeline by region

The date each region code (CSC) first received A166USQUAEZJ5, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ATTUSA (AT&T)Oct 26, 2026day 0A166USQUAEZJ5/A166UOYNAEZJ5/A166USQUAEZJ5
AIOUSA (Cricket)Oct 26, 2026day 0A166USQUAEZJ5/A166UOYNAEZJ5/A166USQUAEZJ5
TMBUSA (T-Mobile)Oct 27, 2026+1 dayA166USQUAEZJ5/A166UOYNAEZJ5/A166USQUAEZJ5
TMKUSA (MetroPCS)Oct 27, 2026+1 dayA166USQUAEZJ5/A166UOYNAEZJ5/A166USQUAEZJ5
USCUSA (US Cellular)Oct 27, 2026+1 dayA166USQUAEZJ5/A166UOYNAEZJ5/A166USQUAEZJ5
VZWUSA (Verizon)Oct 28, 2026+2 daysA166USQUAEZJ5/A166UOYNAEZJ5/A166USQUAEZJ5
DSAUSANov 2, 2026+7 daysA166USQUAEZJ5/A166UOYNAEZJ5/A166USQUAEZJ5
DSHUSANov 2, 2026+7 daysA166USQUAEZJ5/A166UOYNAEZJ5/A166USQUAEZJ5
CCTUSA (Comcast)Nov 4, 2026+9 daysA166USQUAEZJ5/A166UOYNAEZJ5/A166USQUAEZJ5

Download and release notes

samloader download -m SM-A166U -r ATT -v A166USQUAEZJ5/A166UOYNAEZJ5/A166USQUAEZJ5

Samsung's release notes and security patch level for this update: SM-A166U / ATT on doc.samsungmobile.com. What each part of the build number means: decode A166USQUAEZJ5.