F721BXXSCIZF1 – Galaxy Z Flip4 firmware

Build F721BXXSCIZF1 is a security update for the Galaxy Z Flip4 (SM-F721B) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 28, 2026 (method) and has reached 80 regions so far. It keeps bootloader bit 12, so downgrading to the previous build F721BXXSCIZE2 is still possible. Samsung still serves this file.

Model
SM-F721B
Android
Android 16
Type
Security
Bootloader bit
12
First released
Jun 28, 2026
Regions
80

Rollout timeline by region

The date each region code (CSC) first received F721BXXSCIZF1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
EUYEurope (Multi-CSC)Jun 28, 2026day 0F721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
ACRGhanaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
AFGAfghanistanJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
AFRAfricaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
DKRSenegalJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
ECTNigeriaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
EGYEgyptJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
GLBPhilippines (Globe)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
ILOIsraelJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
KSASaudi ArabiaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
LYSLibyaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
MIDMiddle EastJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
MM1Singapore (M1)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
MWDMoroccoJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
PKDPakistanJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
SINSingapore (Singtel)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
STHSingapore (StarHub)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
THLThailandJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
TUNTunisiaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
TURTurkeyJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
XFASouth AfricaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
XFESouth AfricaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
XFVSouth Africa (Vodacom)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
XMEMalaysiaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
XNZNew ZealandJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
XSGUnited Arab EmiratesJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
XSPSingaporeJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
XTCPhilippinesJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
XXVVietnamJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
EUXEurope (Multi-CSC)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXTCIZE1/F721BXXSCIZE1
BOGFrance (Bouygues)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
BTBUnited Kingdom (BT)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
CAUCaucasusJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
EVRUnited Kingdom (EE)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
MEOPortugal (MEO)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
MOBAustria (A1)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
MOTSlovenia (Telekom)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
MSRSerbiaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
O2CCzech Republic (O2)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
PLSPoland (Plus)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
PRTPoland (Play)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
SEKUkraineJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
SFRFrance (SFR)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
SIMSlovenia (A1)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
SKZKazakhstanJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
SWCSwitzerlandJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
TIMItaly (TIM)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
TOPSerbia/MontenegroJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
VIPCroatia (A1)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
XIDIndonesiaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOLECIZE1/F721BXXSCIZE1
CHOChileJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
GTOGuatemalaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
TPAPanamaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
AROArgentinaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
BVOBoliviaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
CDRDominican RepublicJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
CGUGuatemala (Claro)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
COBColombia (Movistar)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
COMColombia (Claro)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
COOColombiaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
CRCCosta RicaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
EBEEcuadorJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
ECOEcuadorJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
UYOUruguayJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
ZTABrazil (Claro)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
ZTMBrazil (TIM)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
ZTOBrazilJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
ZVVBrazil (Vivo)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
PGUGuatemalaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
PNTPanamaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
SAMOceaniaJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
TCEMexico (Telcel)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
UPOUruguayJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
GLONigeria (Glo)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
MXOMexicoJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
PEOPeruJun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
PETPeru (Movistar)Jun 29, 2026+1 dayF721BXXSCIZF1/F721BOWOCIZE1/F721BXXSCIZE1
BKDBangladeshJun 30, 2026+2 daysF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
INSIndiaJun 30, 2026+2 daysF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1
SLKSri LankaJun 30, 2026+2 daysF721BXXSCIZF1/F721BOXMCIZE1/F721BXXSCIZE1

Download and release notes

samloader download -m SM-F721B -r EUX -v F721BXXSCIZF1/F721BOXTCIZE1/F721BXXSCIZE1

Samsung's release notes and security patch level for this update: SM-F721B / EUX on doc.samsungmobile.com. What each part of the build number means: decode F721BXXSCIZF1.