S918BXXSAFZI1 – Galaxy S23 Ultra firmware

Build S918BXXSAFZI1 is a security update for the Galaxy S23 Ultra (SM-S918B) on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 27, 2026 (method) and has reached 98 regions so far. It keeps bootloader bit 10, so downgrading to the previous build S918BXXSAFZH3 is still possible. Samsung still serves this file.

Model
SM-S918B
Android
Android 16
Type
Security
Bootloader bit
10
First released
Sep 27, 2026
Regions
98

Rollout timeline by region

The date each region code (CSC) first received S918BXXSAFZI1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
SEKUkraineSep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
SKZKazakhstanSep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
BOGFrance (Bouygues)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
BTBUnited Kingdom (BT)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
CAUCaucasusSep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
EUXEurope (Multi-CSC)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
EUYEurope (Multi-CSC)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
EVRUnited Kingdom (EE)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
MEOPortugal (MEO)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
MOBAustria (A1)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
MOTSlovenia (Telekom)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
MSRSerbiaSep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
O2CCzech Republic (O2)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
PLSPoland (Plus)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
PRTPoland (Play)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
SERRussiaSep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
SFRFrance (SFR)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
SIMSlovenia (A1)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
SWCSwitzerlandSep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
TIMItaly (TIM)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
TOPSerbia/MontenegroSep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
VIPCroatia (A1)Sep 27, 2026day 0S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
AROArgentinaSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
BVOBoliviaSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
CDRDominican RepublicSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
CGUGuatemala (Claro)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
COBColombia (Movistar)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
COLColombiaSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
COMColombia (Claro)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
COOColombiaSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
CRCCosta RicaSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
CTIArgentina (Claro)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
DORDominican RepublicSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
EBEEcuadorSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
ECOEcuadorSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
GLONigeria (Glo)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
GTOGuatemalaSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
IUSMexico (AT&T)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
MXOMexicoSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
NBSLatin America (open market)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
PEOPeruSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
PETPeru (Movistar)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
PGUGuatemalaSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
PNTPanamaSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
PSNArgentina (Personal)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
SAMOceaniaSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
TCEMexico (Telcel)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
TGPParaguaySep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
TMMMyanmarSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
TPAPanamaSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
UFNArgentina (Movistar)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
UPOUruguaySep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
UYOUruguaySep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
ZTABrazil (Claro)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
ZTMBrazil (TIM)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
ZTOBrazilSep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
ZVVBrazil (Vivo)Sep 28, 2026+1 dayS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
BKDBangladeshSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
INSIndiaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
SLKSri LankaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
ACRGhanaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
AFGAfghanistanSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
AFRAfricaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
DKRSenegalSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
ECTNigeriaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
EGYEgyptSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
GLBPhilippines (Globe)Sep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
ILOIsraelSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
KSASaudi ArabiaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
LYSLibyaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
MIDMiddle EastSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
MM1Singapore (M1)Sep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
MWDMoroccoSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
OPSAustralia (Optus)Sep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
PKDPakistanSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
SINSingapore (Singtel)Sep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
STHSingapore (StarHub)Sep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
TELAustralia (Telstra)Sep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
THLThailandSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
TUNTunisiaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
TURTurkeySep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
VAUAustralia (Vodafone)Sep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
XFASouth AfricaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
XFESouth AfricaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
XFVSouth Africa (Vodacom)Sep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
XIDIndonesiaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOLEAFZI1/S918BXXSAFZE1
XMEMalaysiaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
XNZNew ZealandSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
XSAAustraliaSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
XSGUnited Arab EmiratesSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
XSPSingaporeSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
XTCPhilippinesSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
XXVVietnamSep 29, 2026+2 daysS918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1
CHEChile (Entel)Sep 30, 2026+3 daysS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
CHLChile (Claro)Sep 30, 2026+3 daysS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
CHOChileSep 30, 2026+3 daysS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
CHTChile (Movistar)Sep 30, 2026+3 daysS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1
CHXChileSep 30, 2026+3 daysS918BXXSAFZI1/S918BOWOAFZI1/S918BXXSAFZE1

Download and release notes

samloader download -m SM-S918B -r EUX -v S918BXXSAFZI1/S918BOXMAFZI1/S918BXXSAFZE1

Samsung's release notes and security patch level for this update: SM-S918B / EUX on doc.samsungmobile.com. What each part of the build number means: decode S918BXXSAFZI1.