X306BXXSEDZI1 – Galaxy Tab Active5 5G firmware

Build X306BXXSEDZI1 is a security update for the Galaxy Tab Active5 5G (SM-X306B) on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 20, 2026 (method) and has reached 33 regions so far. It raises the bootloader bit from 13 to 14: once installed, the device no longer accepts firmware with bit 13 or lower, so a downgrade to X306BXXSDDZH1 is blocked. Samsung still serves this file.

Model
SM-X306B
Android
Android 16
Type
Security
Bootloader bit
14
First released
Sep 20, 2026
Regions
33

Rollout timeline by region

The date each region code (CSC) first received X306BXXSEDZI1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
CAUCaucasusSep 20, 2026day 0X306BXXSEDZI1/X306BOXMEDZI1/X306BXXSEDZI1
EGYEgyptSep 20, 2026day 0X306BXXSEDZI1/X306BOJMEDZI1/X306BXXSEDZI1
EUXEurope (Multi-CSC)Sep 20, 2026day 0X306BXXSEDZI1/X306BOXMEDZI1/X306BXXSEDZI1
EUYEurope (Multi-CSC)Sep 20, 2026day 0X306BXXSEDZI1/X306BOXMEDZI1/X306BXXSEDZI1
GLBPhilippines (Globe)Sep 20, 2026day 0X306BXXSEDZI1/X306BOLMEDZI1/X306BXXSEDZI1
ILOIsraelSep 20, 2026day 0X306BXXSEDZI1/X306BOJMEDZI1/X306BXXSEDZI1
KSASaudi ArabiaSep 20, 2026day 0X306BXXSEDZI1/X306BOJMEDZI1/X306BXXSEDZI1
MIDMiddle EastSep 20, 2026day 0X306BXXSEDZI1/X306BOJMEDZI1/X306BXXSEDZI1
MWDMoroccoSep 20, 2026day 0X306BXXSEDZI1/X306BOJMEDZI1/X306BXXSEDZI1
PAKPakistanSep 20, 2026day 0X306BXXSEDZI1/X306BOJMEDZI1/X306BXXSEDZI1
SKZKazakhstanSep 20, 2026day 0X306BXXSEDZI1/X306BOXMEDZI1/X306BXXSEDZI1
TELAustralia (Telstra)Sep 20, 2026day 0X306BXXSEDZI1/X306BOLMEDZI1/X306BXXSEDZI1
THLThailandSep 20, 2026day 0X306BXXSEDZI1/X306BOLMEDZI1/X306BXXSEDZI1
TUNTunisiaSep 20, 2026day 0X306BXXSEDZI1/X306BOJMEDZI1/X306BXXSEDZI1
TURTurkeySep 20, 2026day 0X306BXXSEDZI1/X306BOJMEDZI1/X306BXXSEDZI1
XFASouth AfricaSep 20, 2026day 0X306BXXSEDZI1/X306BOJMEDZI1/X306BXXSEDZI1
XIDIndonesiaSep 20, 2026day 0X306BXXSEDZI1/X306BOLEEDZI1/X306BXXSEDZI1
XMEMalaysiaSep 20, 2026day 0X306BXXSEDZI1/X306BOLMEDZI1/X306BXXSEDZI1
XNZNew ZealandSep 20, 2026day 0X306BXXSEDZI1/X306BOLMEDZI1/X306BXXSEDZI1
XSAAustraliaSep 20, 2026day 0X306BXXSEDZI1/X306BOLMEDZI1/X306BXXSEDZI1
XSGUnited Arab EmiratesSep 20, 2026day 0X306BXXSEDZI1/X306BOJMEDZI1/X306BXXSEDZI1
XSPSingaporeSep 20, 2026day 0X306BXXSEDZI1/X306BOLMEDZI1/X306BXXSEDZI1
XTCPhilippinesSep 20, 2026day 0X306BXXSEDZI1/X306BOLMEDZI1/X306BXXSEDZI1
XXVVietnamSep 20, 2026day 0X306BXXSEDZI1/X306BOLMEDZI1/X306BXXSEDZI1
INSIndiaSep 22, 2026+2 daysX306BXXSEDZI1/X306BOXMEDZI1/X306BXXSEDZI1
AROArgentinaSep 28, 2026+8 daysX306BXXSEDZI1/X306BOWOEDZI1/X306BXXSEDZI1
CHOChileSep 28, 2026+8 daysX306BXXSEDZI1/X306BOWOEDZI1/X306BXXSEDZI1
COOColombiaSep 28, 2026+8 daysX306BXXSEDZI1/X306BOWOEDZI1/X306BXXSEDZI1
GTOGuatemalaSep 28, 2026+8 daysX306BXXSEDZI1/X306BOWOEDZI1/X306BXXSEDZI1
MXOMexicoSep 28, 2026+8 daysX306BXXSEDZI1/X306BOWOEDZI1/X306BXXSEDZI1
PEOPeruSep 28, 2026+8 daysX306BXXSEDZI1/X306BOWOEDZI1/X306BXXSEDZI1
ZTOBrazilSep 28, 2026+8 daysX306BXXSEDZI1/X306BOWOEDZI1/X306BXXSEDZI1
TGYHong KongOct 14, 2026+24 daysX306BXXSEDZI1/X306BOXMEDZI1/X306BXXSEDZI1

Download and release notes

samloader download -m SM-X306B -r EUX -v X306BXXSEDZI1/X306BOXMEDZI1/X306BXXSEDZI1

Samsung's release notes and security patch level for this update: SM-X306B / EUX on doc.samsungmobile.com. What each part of the build number means: decode X306BXXSEDZI1.