J260MUUBS1AUA3 – Galaxy J2 Core firmware

Build J260MUUBS1AUA3 is a security update for the Galaxy J2 Core (SM-J260MU) on Android 8. It first appeared on Samsung's servers on Jan 28, 2021 (method) and has reached 13 regions so far. It keeps bootloader bit 1, so downgrading to the previous build J260MUUBS1ATK3 is still possible. Samsung still serves this file.

Model
SM-J260MU
Android
Android 8
Type
Security
Bootloader bit
1
First released
Jan 28, 2021
Regions
13

Rollout timeline by region

The date each region code (CSC) first received J260MUUBS1AUA3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
CTIArgentina (Claro)Jan 28, 2021day 0J260MUUBS1AUA3/J260MUOWA1ATE2/J260MUUBU1ATE1
CDRDominican RepublicJan 28, 2021day 0J260MUUBS1AUA3/J260MUCDR1ATE1/J260MUUBU1ATE1
PGUGuatemalaJan 28, 2021day 0J260MUUBS1AUA3/J260MUPGU1ATE2/J260MUUBU1ATE1
COMColombia (Claro)Jan 28, 2021day 0J260MUUBS1AUA3/J260MUCOM1ATE1/J260MUUBU1ATE1
AROArgentinaMar 4, 2021+35 daysJ260MUUBS1AUA3/J260MUOWO1ATE1/J260MUUBU1ATE1
BVOBoliviaMar 4, 2021+35 daysJ260MUUBS1AUA3/J260MUOWO1ATE1/J260MUUBU1ATE1
CHOChileMar 4, 2021+35 daysJ260MUUBS1AUA3/J260MUOWO1ATE1/J260MUUBU1ATE1
COOColombiaMar 4, 2021+35 daysJ260MUUBS1AUA3/J260MUOWO1ATE1/J260MUUBU1ATE1
GTOGuatemalaMar 4, 2021+35 daysJ260MUUBS1AUA3/J260MUOWO1ATF1/J260MUUBU1ATE1
TPAPanamaMar 4, 2021+35 daysJ260MUUBS1AUA3/J260MUOWO1ATE1/J260MUUBU1ATE1
UPOUruguayMar 4, 2021+35 daysJ260MUUBS1AUA3/J260MUOWO1ATE1/J260MUUBU1ATE1
UYOUruguayMar 4, 2021+35 daysJ260MUUBS1AUA3/J260MUOWO1ATE1/J260MUUBU1ATE1
ZTOBrazilMar 4, 2021+35 daysJ260MUUBS1AUA3/J260MUOWO1ATE1/J260MUUBU1ATE1

Download and release notes

samloader download -m SM-J260MU -r CTI -v J260MUUBS1AUA3/J260MUOWA1ATE2/J260MUUBU1ATE1

Samsung's release notes and security patch level for this update: SM-J260MU / CTI on doc.samsungmobile.com. What each part of the build number means: decode J260MUUBS1AUA3.