G531MUBU1API1 – GALAXY GRAND Prime firmware

Build G531MUBU1API1 is a feature update for the GALAXY GRAND Prime (SM-G531M) on Android 5. It first appeared on Samsung's servers on Oct 6, 2016 (method) and has reached 5 regions so far. It keeps bootloader bit 1, so downgrading to the previous build G531MVJU1APG2 is still possible. Samsung still serves this file.

Model
SM-G531M
Android
Android 5
Type
Feature
Bootloader bit
1
First released
Oct 6, 2016
Regions
5

Rollout timeline by region

The date each region code (CSC) first received G531MUBU1API1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
TPAPanamaOct 6, 2016day 0G531MUBU1API1/G531MUUB1API1/G531MVJU1APE1
UPOUruguayOct 11, 2016+5 daysG531MUBU1API1/G531MUUB1API1/G531MVJU1APE1
AROArgentinaOct 11, 2016+5 daysG531MUBU1API1/G531MUUB1API1/G531MVJU1APE1
COOColombiaOct 20, 2016+14 daysG531MUBU1API1/G531MUUB1API1/G531MVJU1APE1
BVOBoliviaNov 8, 2016+33 daysG531MUBU1API1/G531MUUB1API1/G531MVJU1APE1

Download and release notes

samloader download -m SM-G531M -r TPA -v G531MUBU1API1/G531MUUB1API1/G531MVJU1APE1

Samsung's release notes and security patch level for this update: SM-G531M / TPA on doc.samsungmobile.com. What each part of the build number means: decode G531MUBU1API1.