X306BXXSCDZG1 – Galaxy Tab Active5 5G firmware

Build X306BXXSCDZG1 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 Jul 29, 2026 (method) and has reached 33 regions so far. It raises the bootloader bit from 11 to 12: once installed, the device no longer accepts firmware with bit 11 or lower, so a downgrade to X306BXXSBDZF3 is blocked. Samsung still serves this file.

Model
SM-X306B
Android
Android 16
Type
Security
Bootloader bit
12
First released
Jul 29, 2026
Regions
33

Rollout timeline by region

The date each region code (CSC) first received X306BXXSCDZG1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
TELAustralia (Telstra)Jul 29, 2026day 0X306BXXSCDZG1/X306BOLMCDZG1/X306BXXSCDZG1
XSAAustraliaJul 29, 2026day 0X306BXXSCDZG1/X306BOLMCDZG1/X306BXXSCDZG1
XIDIndonesiaJul 29, 2026day 0X306BXXSCDZG1/X306BOLECDZG1/X306BXXSCDZG1
GLBPhilippines (Globe)Jul 29, 2026day 0X306BXXSCDZG1/X306BOLMCDZG1/X306BXXSCDZG1
THLThailandJul 29, 2026day 0X306BXXSCDZG1/X306BOLMCDZG1/X306BXXSCDZG1
XMEMalaysiaJul 29, 2026day 0X306BXXSCDZG1/X306BOLMCDZG1/X306BXXSCDZG1
XNZNew ZealandJul 29, 2026day 0X306BXXSCDZG1/X306BOLMCDZG1/X306BXXSCDZG1
XTCPhilippinesJul 29, 2026day 0X306BXXSCDZG1/X306BOLMCDZG1/X306BXXSCDZG1
XXVVietnamJul 29, 2026day 0X306BXXSCDZG1/X306BOLMCDZG1/X306BXXSCDZG1
CAUCaucasusJul 29, 2026day 0X306BXXSCDZG1/X306BOXMCDZG1/X306BXXSCDZG1
EUXEurope (Multi-CSC)Jul 29, 2026day 0X306BXXSCDZG1/X306BOXMCDZG1/X306BXXSCDZG1
EUYEurope (Multi-CSC)Jul 29, 2026day 0X306BXXSCDZG1/X306BOXMCDZG1/X306BXXSCDZG1
SKZKazakhstanJul 29, 2026day 0X306BXXSCDZG1/X306BOXMCDZG1/X306BXXSCDZG1
EGYEgyptJul 29, 2026day 0X306BXXSCDZG1/X306BOJMCDZG1/X306BXXSCDZG1
KSASaudi ArabiaJul 29, 2026day 0X306BXXSCDZG1/X306BOJMCDZG1/X306BXXSCDZG1
MIDMiddle EastJul 29, 2026day 0X306BXXSCDZG1/X306BOJMCDZG1/X306BXXSCDZG1
MWDMoroccoJul 29, 2026day 0X306BXXSCDZG1/X306BOJMCDZG1/X306BXXSCDZG1
PAKPakistanJul 29, 2026day 0X306BXXSCDZG1/X306BOJMCDZG1/X306BXXSCDZG1
TUNTunisiaJul 29, 2026day 0X306BXXSCDZG1/X306BOJMCDZG1/X306BXXSCDZG1
TURTurkeyJul 29, 2026day 0X306BXXSCDZG1/X306BOJMCDZG1/X306BXXSCDZG1
XFASouth AfricaJul 29, 2026day 0X306BXXSCDZG1/X306BOJMCDZG1/X306BXXSCDZG1
XSGUnited Arab EmiratesJul 29, 2026day 0X306BXXSCDZG1/X306BOJMCDZG1/X306BXXSCDZG1
ILOIsraelJul 29, 2026day 0X306BXXSCDZG1/X306BOJMCDZG1/X306BXXSCDZG1
AROArgentinaJul 30, 2026+1 dayX306BXXSCDZG1/X306BOWOCDZG1/X306BXXSCDZG1
CHOChileJul 30, 2026+1 dayX306BXXSCDZG1/X306BOWOCDZG1/X306BXXSCDZG1
COOColombiaJul 30, 2026+1 dayX306BXXSCDZG1/X306BOWOCDZG1/X306BXXSCDZG1
GTOGuatemalaJul 30, 2026+1 dayX306BXXSCDZG1/X306BOWOCDZG1/X306BXXSCDZG1
MXOMexicoJul 30, 2026+1 dayX306BXXSCDZG1/X306BOWOCDZG1/X306BXXSCDZG1
PEOPeruJul 30, 2026+1 dayX306BXXSCDZG1/X306BOWOCDZG1/X306BXXSCDZG1
ZTOBrazilJul 30, 2026+1 dayX306BXXSCDZG1/X306BOWOCDZG1/X306BXXSCDZG1
INSIndiaJul 30, 2026+1 dayX306BXXSCDZG1/X306BOXMCDZG1/X306BXXSCDZG1
XSPSingaporeAug 2, 2026+4 daysX306BXXSCDZG1/X306BOLMCDZG1/X306BXXSCDZG1
TGYHong KongAug 12, 2026+14 daysX306BXXSCDZG1/X306BOXMCDZG1/X306BXXSCDZG1

Download and release notes

samloader download -m SM-X306B -r EUX -v X306BXXSCDZG1/X306BOXMCDZG1/X306BXXSCDZG1

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 X306BXXSCDZG1.