X306BXXSBDZF3 – Galaxy Tab Active5 5G firmware

Build X306BXXSBDZF3 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 Jun 28, 2026 (method) and has reached 33 regions so far. It raises the bootloader bit from 10 to 11: once installed, the device no longer accepts firmware with bit 10 or lower, so a downgrade to X306BXXUADZE3 is blocked. Samsung still serves this file.

Model
SM-X306B
Android
Android 16
Type
Security
Bootloader bit
11
First released
Jun 28, 2026
Regions
33

Rollout timeline by region

The date each region code (CSC) first received X306BXXSBDZF3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
EGYEgyptJun 28, 2026day 0X306BXXSBDZF3/X306BOJMBDZF4/X306BXXSBDZF3
ILOIsraelJun 28, 2026day 0X306BXXSBDZF3/X306BOJMBDZF4/X306BXXSBDZF3
KSASaudi ArabiaJun 28, 2026day 0X306BXXSBDZF3/X306BOJMBDZF4/X306BXXSBDZF3
MIDMiddle EastJun 28, 2026day 0X306BXXSBDZF3/X306BOJMBDZF4/X306BXXSBDZF3
MWDMoroccoJun 28, 2026day 0X306BXXSBDZF3/X306BOJMBDZF4/X306BXXSBDZF3
PAKPakistanJun 28, 2026day 0X306BXXSBDZF3/X306BOJMBDZF4/X306BXXSBDZF3
TUNTunisiaJun 28, 2026day 0X306BXXSBDZF3/X306BOJMBDZF4/X306BXXSBDZF3
TURTurkeyJun 28, 2026day 0X306BXXSBDZF3/X306BOJMBDZF4/X306BXXSBDZF3
XFASouth AfricaJun 28, 2026day 0X306BXXSBDZF3/X306BOJMBDZF4/X306BXXSBDZF3
XSGUnited Arab EmiratesJun 28, 2026day 0X306BXXSBDZF3/X306BOJMBDZF4/X306BXXSBDZF3
XIDIndonesiaJun 28, 2026day 0X306BXXSBDZF3/X306BOLEBDZF3/X306BXXSBDZF3
GLBPhilippines (Globe)Jun 28, 2026day 0X306BXXSBDZF3/X306BOLMBDZF3/X306BXXSBDZF3
TELAustralia (Telstra)Jun 28, 2026day 0X306BXXSBDZF3/X306BOLMBDZF3/X306BXXSBDZF3
THLThailandJun 28, 2026day 0X306BXXSBDZF3/X306BOLMBDZF3/X306BXXSBDZF3
XMEMalaysiaJun 28, 2026day 0X306BXXSBDZF3/X306BOLMBDZF3/X306BXXSBDZF3
XNZNew ZealandJun 28, 2026day 0X306BXXSBDZF3/X306BOLMBDZF3/X306BXXSBDZF3
XSAAustraliaJun 28, 2026day 0X306BXXSBDZF3/X306BOLMBDZF3/X306BXXSBDZF3
XSPSingaporeJun 28, 2026day 0X306BXXSBDZF3/X306BOLMBDZF3/X306BXXSBDZF3
XTCPhilippinesJun 28, 2026day 0X306BXXSBDZF3/X306BOLMBDZF3/X306BXXSBDZF3
XXVVietnamJun 28, 2026day 0X306BXXSBDZF3/X306BOLMBDZF3/X306BXXSBDZF3
CAUCaucasusJun 28, 2026day 0X306BXXSBDZF3/X306BOXMBDZF3/X306BXXSBDZF3
EUXEurope (Multi-CSC)Jun 28, 2026day 0X306BXXSBDZF3/X306BOXMBDZF3/X306BXXSBDZF3
EUYEurope (Multi-CSC)Jun 28, 2026day 0X306BXXSBDZF3/X306BOXMBDZF3/X306BXXSBDZF3
SKZKazakhstanJun 28, 2026day 0X306BXXSBDZF3/X306BOXMBDZF3/X306BXXSBDZF3
AROArgentinaJun 30, 2026+2 daysX306BXXSBDZF3/X306BOWOBDZF3/X306BXXSBDZF3
CHOChileJun 30, 2026+2 daysX306BXXSBDZF3/X306BOWOBDZF3/X306BXXSBDZF3
COOColombiaJun 30, 2026+2 daysX306BXXSBDZF3/X306BOWOBDZF3/X306BXXSBDZF3
GTOGuatemalaJun 30, 2026+2 daysX306BXXSBDZF3/X306BOWOBDZF3/X306BXXSBDZF3
MXOMexicoJun 30, 2026+2 daysX306BXXSBDZF3/X306BOWOBDZF3/X306BXXSBDZF3
PEOPeruJun 30, 2026+2 daysX306BXXSBDZF3/X306BOWOBDZF3/X306BXXSBDZF3
ZTOBrazilJun 30, 2026+2 daysX306BXXSBDZF3/X306BOWOBDZF3/X306BXXSBDZF3
INSIndiaJun 30, 2026+2 daysX306BXXSBDZF3/X306BOXMBDZF3/X306BXXSBDZF3
TGYHong KongJul 7, 2026+9 daysX306BXXSBDZF3/X306BOXMBDZF3/X306BXXSBDZF3

Download and release notes

samloader download -m SM-X306B -r EUX -v X306BXXSBDZF3/X306BOXMBDZF3/X306BXXSBDZF3

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 X306BXXSBDZF3.