A366BXXU9CZDD – Galaxy A36 5G firmware

Build A366BXXU9CZDD is a feature update for the Galaxy A36 5G (SM-A366B) on Android 16 (One UI 8). It first appeared on Samsung's servers on May 20, 2026 (method) and has reached 44 regions so far. It keeps bootloader bit 9, so downgrading to the previous build A366BXXS9BZDA is still possible. Samsung still serves this file.

Model
SM-A366B
Android
Android 16
Type
Feature
Bootloader bit
9
First released
May 20, 2026
Regions
44

Rollout timeline by region

The date each region code (CSC) first received A366BXXU9CZDD, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BOGFrance (Bouygues)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
EUXEurope (Multi-CSC)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
EUYEurope (Multi-CSC)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
MEOPortugal (MEO)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
MOBAustria (A1)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
MOTSlovenia (Telekom)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
MSRSerbiaMay 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
PLSPoland (Plus)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
PRTPoland (Play)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
SFRFrance (SFR)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
SIMSlovenia (A1)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
SWCSwitzerlandMay 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
TOPSerbia/MontenegroMay 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
VIPCroatia (A1)May 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
TURTurkeyMay 20, 2026day 0A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD
XSAAustraliaMay 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
ACRGhanaMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
AFGAfghanistanMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
AFRAfricaMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
DKRSenegalMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
ECTNigeriaMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
EGYEgyptMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
ILOIsraelMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
KSASaudi ArabiaMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
LYSLibyaMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
MIDMiddle EastMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
MWDMoroccoMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
PAKPakistanMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
PKDPakistanMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
TUNTunisiaMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
XFASouth AfricaMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
XFVSouth Africa (Vodacom)May 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
XSGUnited Arab EmiratesMay 21, 2026+1 dayA366BXXU9CZDD/A366BOJM9CZDD/A366BXXU9CZDD
GLBPhilippines (Globe)May 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
MM1Singapore (M1)May 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
SINSingapore (Singtel)May 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
STHSingapore (StarHub)May 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
THLThailandMay 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
XIDIndonesiaMay 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
XMEMalaysiaMay 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
XSPSingaporeMay 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
XTCPhilippinesMay 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
XXVVietnamMay 21, 2026+1 dayA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD
XNZNew ZealandMay 27, 2026+7 daysA366BXXU9CZDD/A366BOLM9CZDD/A366BXXU9CZDD

Download and release notes

samloader download -m SM-A366B -r EUX -v A366BXXU9CZDD/A366BOXM9CZDD/A366BXXU9CZDD

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 A366BXXU9CZDD.