I9506XXUDRB1 – GALAXY S4 LTE-A firmware

Build I9506XXUDRB1 is a – update for the GALAXY S4 LTE-A (GT-I9506) on Android 5. It first appeared on Samsung's servers on Mar 19, 2018 (method) and has reached 7 regions so far. It raises the bootloader bit from 28 to 30: once installed, the device no longer accepts firmware with bit 28 or lower, so a downgrade to I9506XXSDPK3 is blocked. Samsung still serves this file.

Model
GT-I9506
Android
Android 5
Type
–
Bootloader bit
30
First released
Mar 19, 2018
Regions
7

Not yet released in 22 regions that are still on an older build: ATL, CYV, ETL, EUR, EVR, FTM, MM1, MOB, NEE, NZC, ORX, SIN, STH, TEL and 8 more.

Rollout timeline by region

The date each region code (CSC) first received I9506XXUDRB1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
TMHHungary (Telekom)Mar 19, 2018day 0I9506XXUDRB1/I9506TMHDRB1/I9506XXUDRA1
TPLPoland (T-Mobile)Mar 20, 2018+1 dayI9506XXUDRB1/I9506TPLDRB1/I9506XXUDRA1
DTMGermany (Telekom)Mar 20, 2018+1 dayI9506XXUDRB1/I9506DTMDRB1/I9506XXUDRA1
COSGreece (Cosmote)Mar 21, 2018+2 daysI9506XXUDRB1/I9506COSDRB1/I9506XXUDRA1
TTRTurkey (Turkcell)Mar 22, 2018+3 daysI9506XXUDRB1/I9506TTRDRB1/I9506XXUDRA1
CROCroatiaMar 22, 2018+3 daysI9506XXUDRB1/I9506CRODRB1/I9506XXUDRA1
TNLNetherlands (T-Mobile)Mar 22, 2018+3 daysI9506XXUDRB1/I9506TNLDRB1/I9506XXUDRA1

Download and release notes

samloader download -m GT-I9506 -r TMH -v I9506XXUDRB1/I9506TMHDRB1/I9506XXUDRA1

Samsung's release notes and security patch level for this update: GT-I9506 / TMH on doc.samsungmobile.com. What each part of the build number means: decode I9506XXUDRB1.