A366BXXSACZE3 – Galaxy A36 5G firmware

Build A366BXXSACZE3 is a security update for the Galaxy A36 5G (SM-A366B) on Android 16 (One UI 8). It first appeared on Samsung's servers on May 31, 2026 (method) and has reached 44 regions so far. It raises the bootloader bit from 9 to 10: once installed, the device no longer accepts firmware with bit 9 or lower, so a downgrade to A366BXXU9CZDD is blocked. Samsung still serves this file.

Model
SM-A366B
Android
Android 16
Type
Security
Bootloader bit
10
First released
May 31, 2026
Regions
44

Rollout timeline by region

The date each region code (CSC) first received A366BXXSACZE3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BOGFrance (Bouygues)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
EUXEurope (Multi-CSC)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
EUYEurope (Multi-CSC)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
MEOPortugal (MEO)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
MOBAustria (A1)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
MOTSlovenia (Telekom)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
MSRSerbiaMay 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
PLSPoland (Plus)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
PRTPoland (Play)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
SFRFrance (SFR)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
SIMSlovenia (A1)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
SWCSwitzerlandMay 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
TOPSerbia/MontenegroMay 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
TURTurkeyMay 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
VIPCroatia (A1)May 31, 2026day 0A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3
GLBPhilippines (Globe)Jun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
MM1Singapore (M1)Jun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
SINSingapore (Singtel)Jun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
STHSingapore (StarHub)Jun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
THLThailandJun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
XMEMalaysiaJun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
XNZNew ZealandJun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
XSAAustraliaJun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
XSPSingaporeJun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
XTCPhilippinesJun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
XXVVietnamJun 1, 2026+1 dayA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3
ACRGhanaJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
AFGAfghanistanJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
AFRAfricaJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
DKRSenegalJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
ECTNigeriaJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
EGYEgyptJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
ILOIsraelJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
KSASaudi ArabiaJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
LYSLibyaJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
MIDMiddle EastJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
MWDMoroccoJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
PAKPakistanJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
PKDPakistanJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
TUNTunisiaJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
XFASouth AfricaJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
XFVSouth Africa (Vodacom)Jun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
XSGUnited Arab EmiratesJun 1, 2026+1 dayA366BXXSACZE3/A366BOJMACZE3/A366BXXSACZE3
XIDIndonesiaJun 4, 2026+4 daysA366BXXSACZE3/A366BOLMACZE3/A366BXXSACZE3

Download and release notes

samloader download -m SM-A366B -r EUX -v A366BXXSACZE3/A366BOXMACZE3/A366BXXSACZE3

Samsung's release notes and security patch level for this update: SM-A366B / EUX on doc.samsungmobile.com. What each part of the build number means: decode A366BXXSACZE3.