T636BXXSBDZH4 – Galaxy Tab Active4 Pro firmware

Build T636BXXSBDZH4 is a security update for the Galaxy Tab Active4 Pro (SM-T636B) on Android 15 (One UI 7). It first appeared on Samsung's servers on Sep 3, 2026 (method) and has reached 21 regions so far. It keeps bootloader bit 11, so downgrading to the previous build T636BXXSBDZE2 is still possible. Samsung still serves this file.

Model
SM-T636B
Android
Android 15
Type
Security
Bootloader bit
11
First released
Sep 3, 2026
Regions
21

Rollout timeline by region

The date each region code (CSC) first received T636BXXSBDZH4, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
EGYEgyptSep 3, 2026day 0T636BXXSBDZH4/T636BOJMBDZH4/T636BXXSBDZH4
ILOIsraelSep 3, 2026day 0T636BXXSBDZH4/T636BOJMBDZH4/T636BXXSBDZH4
KSASaudi ArabiaSep 3, 2026day 0T636BXXSBDZH4/T636BOJMBDZH4/T636BXXSBDZH4
MIDMiddle EastSep 3, 2026day 0T636BXXSBDZH4/T636BOJMBDZH4/T636BXXSBDZH4
MWDMoroccoSep 3, 2026day 0T636BXXSBDZH4/T636BOJMBDZH4/T636BXXSBDZH4
XSGUnited Arab EmiratesSep 3, 2026day 0T636BXXSBDZH4/T636BOJMBDZH4/T636BXXSBDZH4
TELAustralia (Telstra)Sep 3, 2026day 0T636BXXSBDZH4/T636BOLMBDZH4/T636BXXSBDZH4
THLThailandSep 3, 2026day 0T636BXXSBDZH4/T636BOLMBDZH4/T636BXXSBDZH4
XMEMalaysiaSep 3, 2026day 0T636BXXSBDZH4/T636BOLMBDZH4/T636BXXSBDZH4
XNZNew ZealandSep 3, 2026day 0T636BXXSBDZH4/T636BOLMBDZH4/T636BXXSBDZH4
XSAAustraliaSep 3, 2026day 0T636BXXSBDZH4/T636BOLMBDZH4/T636BXXSBDZH4
XSPSingaporeSep 3, 2026day 0T636BXXSBDZH4/T636BOLMBDZH4/T636BXXSBDZH4
CAUCaucasusSep 3, 2026day 0T636BXXSBDZH4/T636BOXMBDZH4/T636BXXSBDZH4
EUXEurope (Multi-CSC)Sep 3, 2026day 0T636BXXSBDZH4/T636BOXMBDZH4/T636BXXSBDZH4
EUYEurope (Multi-CSC)Sep 3, 2026day 0T636BXXSBDZH4/T636BOXMBDZH4/T636BXXSBDZH4
SKZKazakhstanSep 3, 2026day 0T636BXXSBDZH4/T636BOXMBDZH4/T636BXXSBDZH4
COOColombiaSep 9, 2026+6 daysT636BXXSBDZH4/T636BOWOBDZH4/T636BXXSBDZH4
GTOGuatemalaSep 9, 2026+6 daysT636BXXSBDZH4/T636BOWOBDZH4/T636BXXSBDZH4
MXOMexicoSep 9, 2026+6 daysT636BXXSBDZH4/T636BOWOBDZH4/T636BXXSBDZH4
PEOPeruSep 9, 2026+6 daysT636BXXSBDZH4/T636BOWOBDZH4/T636BXXSBDZH4
CHOChileSep 10, 2026+7 daysT636BXXSBDZH4/T636BOWOBDZH4/T636BXXSBDZH4

Download and release notes

samloader download -m SM-T636B -r EUX -v T636BXXSBDZH4/T636BOXMBDZH4/T636BXXSBDZH4

Samsung's release notes and security patch level for this update: SM-T636B / EUX on doc.samsungmobile.com. What each part of the build number means: decode T636BXXSBDZH4.