A166BXXUAEZJ5 – Galaxy A16 5G firmware

Build A166BXXUAEZJ5 is a feature update for the Galaxy A16 5G (SM-A166B) on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 26, 2026 (method) and has reached 14 regions so far. It keeps bootloader bit 10, so downgrading to the previous build A166BXXSADZH1 is still possible. Samsung still serves this file.

Model
SM-A166B
Android
Android 17
Type
Feature
Bootloader bit
10
First released
Oct 26, 2026
Regions
14

Rollout timeline by region

The date each region code (CSC) first received A166BXXUAEZJ5, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BOGFrance (Bouygues)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
EUXEurope (Multi-CSC)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
EUYEurope (Multi-CSC)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
MEOPortugal (MEO)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
MOBAustria (A1)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
MOTSlovenia (Telekom)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
MSRSerbiaOct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
PLSPoland (Plus)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
PRTPoland (Play)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
SFRFrance (SFR)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
SIMSlovenia (A1)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
TOPSerbia/MontenegroOct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
TURTurkeyOct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5
VIPCroatia (A1)Oct 26, 2026day 0A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5

Download and release notes

samloader download -m SM-A166B -r EUX -v A166BXXUAEZJ5/A166BOXMAEZJ5/A166BXXUAEZJ5

Samsung's release notes and security patch level for this update: SM-A166B / EUX on doc.samsungmobile.com. What each part of the build number means: decode A166BXXUAEZJ5.