S721BXXSFEZJ1 – Galaxy S24 FE firmware

Build S721BXXSFEZJ1 is a security update for the Galaxy S24 FE (SM-S721B) on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 25, 2026 (method) and has reached 85 regions so far. It raises the bootloader bit from 14 to 15: once installed, the device no longer accepts firmware with bit 14 or lower, so a downgrade to S721BXXUEEZIF is blocked. Samsung still serves this file.

Model
SM-S721B
Android
Android 17
Type
Security
Bootloader bit
15
First released
Oct 25, 2026
Regions
85

Rollout timeline by region

The date each region code (CSC) first received S721BXXSFEZJ1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BOGFrance (Bouygues)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
EUXEurope (Multi-CSC)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
EUYEurope (Multi-CSC)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
MEOPortugal (MEO)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
MOBAustria (A1)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
MOTSlovenia (Telekom)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
MSRSerbiaOct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
PLSPoland (Plus)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
CAUCaucasusOct 25, 2026day 0S721BXXSFEZJ1/S721BOXEFEZJ1/S721BXXSFEZJ1
PRTPoland (Play)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
SFRFrance (SFR)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
SIMSlovenia (A1)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
SWCSwitzerlandOct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
TOPSerbia/MontenegroOct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
TURTurkeyOct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
VIPCroatia (A1)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1
GLBPhilippines (Globe)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
MM1Singapore (M1)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
OPSAustralia (Optus)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
SINSingapore (Singtel)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
SKZKazakhstanOct 25, 2026day 0S721BXXSFEZJ1/S721BOXEFEZJ1/S721BXXSFEZJ1
STHSingapore (StarHub)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
TELAustralia (Telstra)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
THLThailandOct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
VAUAustralia (Vodafone)Oct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
XIDIndonesiaOct 25, 2026day 0S721BXXSFEZJ1/S721BOLEFEZJ1/S721BXXSFEZJ1
XMEMalaysiaOct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
XSAAustraliaOct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
XSPSingaporeOct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
XTCPhilippinesOct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
XXVVietnamOct 25, 2026day 0S721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
XNZNew ZealandOct 26, 2026+1 dayS721BXXSFEZJ1/S721BOLMFEZJ1/S721BXXSFEZJ1
TPAPanamaOct 26, 2026+1 dayS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
BVOBoliviaOct 26, 2026+1 dayS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
GTOGuatemalaOct 26, 2026+1 dayS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
ZTOBrazilOct 26, 2026+1 dayS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
ZTABrazil (Claro)Oct 26, 2026+1 dayS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
ZTMBrazil (TIM)Oct 26, 2026+1 dayS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
ZVVBrazil (Vivo)Oct 26, 2026+1 dayS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
ACRGhanaOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
AFGAfghanistanOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
AFRAfricaOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
DKRSenegalOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
ECTNigeriaOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
EGYEgyptOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
ILOIsraelOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
KSASaudi ArabiaOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
LYSLibyaOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
MIDMiddle EastOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
MWDMoroccoOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
PAKPakistanOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
PKDPakistanOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
TUNTunisiaOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
XFASouth AfricaOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
XFVSouth Africa (Vodacom)Oct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
XSGUnited Arab EmiratesOct 27, 2026+2 daysS721BXXSFEZJ1/S721BOJMFEZJ1/S721BXXSFEZJ1
BKDBangladeshOct 28, 2026+3 daysS721BXXSFEZJ1/S721BODMFEZJ1/S721BXXSFEZJ1
BNGBelgiumOct 28, 2026+3 daysS721BXXSFEZJ1/S721BODMFEZJ1/S721BXXSFEZJ1
INSIndiaOct 28, 2026+3 daysS721BXXSFEZJ1/S721BODMFEZJ1/S721BXXSFEZJ1
NPBNepalOct 28, 2026+3 daysS721BXXSFEZJ1/S721BODMFEZJ1/S721BXXSFEZJ1
SLKSri LankaOct 28, 2026+3 daysS721BXXSFEZJ1/S721BODMFEZJ1/S721BXXSFEZJ1
MXOMexicoOct 28, 2026+3 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
IUSMexico (AT&T)Oct 28, 2026+3 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
TCEMexico (Telcel)Oct 28, 2026+3 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
TMMMyanmarOct 28, 2026+3 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
COOColombiaOct 29, 2026+4 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
COBColombia (Movistar)Oct 29, 2026+4 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
COLColombiaOct 29, 2026+4 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
AROArgentinaNov 5, 2026+11 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
CDRDominican RepublicNov 5, 2026+11 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
CTIArgentina (Claro)Nov 5, 2026+11 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
PSNArgentina (Personal)Nov 5, 2026+11 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
UFNArgentina (Movistar)Nov 5, 2026+11 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
COMColombia (Claro)Nov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
SAMOceaniaNov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
TGPParaguayNov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
UPOUruguayNov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
PEOPeruNov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
PETPeru (Movistar)Nov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
PGUGuatemalaNov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
PNTPanamaNov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
GLONigeria (Glo)Nov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
DORDominican RepublicNov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
CGUGuatemala (Claro)Nov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1
CRCCosta RicaNov 12, 2026+18 daysS721BXXSFEZJ1/S721BOWOFEZJ1/S721BXXSFEZJ1

Download and release notes

samloader download -m SM-S721B -r EUX -v S721BXXSFEZJ1/S721BOXMFEZJ1/S721BXXSFEZJ1

Samsung's release notes and security patch level for this update: SM-S721B / EUX on doc.samsungmobile.com. What each part of the build number means: decode S721BXXSFEZJ1.