A366BXXSCCZH1 – Galaxy A36 5G firmware

Build A366BXXSCCZH1 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 Sep 2, 2026 (method) and has reached 44 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 A366BXXSBCZG1 is blocked. Samsung still serves this file.

Model
SM-A366B
Android
Android 16
Type
Security
Bootloader bit
12
First released
Sep 2, 2026
Regions
44

Rollout timeline by region

The date each region code (CSC) first received A366BXXSCCZH1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
GLBPhilippines (Globe)Sep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
MM1Singapore (M1)Sep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
SINSingapore (Singtel)Sep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
STHSingapore (StarHub)Sep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
THLThailandSep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
XIDIndonesiaSep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
XMEMalaysiaSep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
XNZNew ZealandSep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
XSPSingaporeSep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
XTCPhilippinesSep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
XXVVietnamSep 2, 2026day 0A366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1
BOGFrance (Bouygues)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
EUXEurope (Multi-CSC)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
EUYEurope (Multi-CSC)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
MEOPortugal (MEO)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
MOBAustria (A1)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
MOTSlovenia (Telekom)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
MSRSerbiaSep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
PLSPoland (Plus)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
PRTPoland (Play)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
SFRFrance (SFR)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
SIMSlovenia (A1)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
SWCSwitzerlandSep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
TOPSerbia/MontenegroSep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
TURTurkeySep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
VIPCroatia (A1)Sep 2, 2026day 0A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1
ACRGhanaSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
AFGAfghanistanSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
AFRAfricaSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
DKRSenegalSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
ECTNigeriaSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
EGYEgyptSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
ILOIsraelSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
KSASaudi ArabiaSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
LYSLibyaSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
MIDMiddle EastSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
MWDMoroccoSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
PAKPakistanSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
PKDPakistanSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
TUNTunisiaSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
XFASouth AfricaSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
XFVSouth Africa (Vodacom)Sep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
XSGUnited Arab EmiratesSep 2, 2026day 0A366BXXSCCZH1/A366BOJMCCZH1/A366BXXSCCZH1
XSAAustraliaSep 3, 2026+1 dayA366BXXSCCZH1/A366BOLMCCZH1/A366BXXSCCZH1

Download and release notes

samloader download -m SM-A366B -r EUX -v A366BXXSCCZH1/A366BOXMCCZH1/A366BXXSCCZH1

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 A366BXXSCCZH1.