S931BXXSDDZJ1 – Galaxy S25 firmware

Build S931BXXSDDZJ1 is a security update for the Galaxy S25 (SM-S931B) on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 21, 2026 (method) and has reached 89 regions so far. It raises the bootloader bit from 12 to 13: once installed, the device no longer accepts firmware with bit 12 or lower, so a downgrade to S931BXXUCDZIF is blocked. Samsung still serves this file.

Model
SM-S931B
Android
Android 17
Type
Security
Bootloader bit
13
First released
Oct 21, 2026
Regions
89

Rollout timeline by region

The date each region code (CSC) first received S931BXXSDDZJ1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
EUYEurope (Multi-CSC)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
ACRGhanaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
AFGAfghanistanOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
AFRAfricaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
DKRSenegalOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
ECTNigeriaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
EGYEgyptOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
ILOIsraelOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
KSASaudi ArabiaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
LYSLibyaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
MIDMiddle EastOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
MWDMoroccoOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
PAKPakistanOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
PKDPakistanOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
TUNTunisiaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
XFASouth AfricaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
XFVSouth Africa (Vodacom)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
XSGUnited Arab EmiratesOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
XXVVietnamOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
CAUCaucasusOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
GLBPhilippines (Globe)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
MM1Singapore (M1)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
OPSAustralia (Optus)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
SERRussiaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
SINSingapore (Singtel)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
SKZKazakhstanOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
STHSingapore (StarHub)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
TELAustralia (Telstra)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
THLThailandOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
VAUAustralia (Vodafone)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
XIDIndonesiaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
XMEMalaysiaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
XNZNew ZealandOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
XSAAustraliaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
XSPSingaporeOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
XTCPhilippinesOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
BOGFrance (Bouygues)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
EUXEurope (Multi-CSC)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
MEOPortugal (MEO)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
MOBAustria (A1)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
MOTSlovenia (Telekom)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
MSRSerbiaOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
PLSPoland (Plus)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
PRTPoland (Play)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
SFRFrance (SFR)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
SIMSlovenia (A1)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
SWCSwitzerlandOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
TOPSerbia/MontenegroOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
TURTurkeyOct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
VIPCroatia (A1)Oct 21, 2026day 0S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
INSIndiaOct 22, 2026+1 dayS931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
NPBNepalOct 22, 2026+1 dayS931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
SLKSri LankaOct 22, 2026+1 dayS931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1
AROArgentinaOct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
BVOBoliviaOct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
COBColombia (Movistar)Oct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
COLColombiaOct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
COOColombiaOct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
CTIArgentina (Claro)Oct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
GTOGuatemalaOct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
IUSMexico (AT&T)Oct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
MXOMexicoOct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
PSNArgentina (Personal)Oct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
TCEMexico (Telcel)Oct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
TMMMyanmarOct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
TPAPanamaOct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
UFNArgentina (Movistar)Oct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
ZTABrazil (Claro)Oct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
ZTMBrazil (TIM)Oct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
ZTOBrazilOct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
ZVVBrazil (Vivo)Oct 26, 2026+5 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
CGUGuatemala (Claro)Oct 27, 2026+6 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
CRCCosta RicaOct 27, 2026+6 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
DORDominican RepublicOct 27, 2026+6 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
GLONigeria (Glo)Oct 27, 2026+6 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
PGUGuatemalaOct 27, 2026+6 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
TGPParaguayOct 27, 2026+6 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
UPOUruguayOct 27, 2026+6 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
CHEChile (Entel)Oct 29, 2026+8 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
CHLChile (Claro)Oct 29, 2026+8 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
CHOChileOct 29, 2026+8 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
CHTChile (Movistar)Oct 29, 2026+8 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
EBEEcuadorOct 29, 2026+8 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
ECOEcuadorOct 29, 2026+8 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
PEOPeruOct 29, 2026+8 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
PETPeru (Movistar)Oct 29, 2026+8 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
PNTPanamaOct 29, 2026+8 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
SAMOceaniaOct 29, 2026+8 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1
CDRDominican RepublicNov 3, 2026+13 daysS931BXXSDDZJ1/S931BOWODDZJ1/S931BXXSDDZJ1

Download and release notes

samloader download -m SM-S931B -r EUX -v S931BXXSDDZJ1/S931BOXMDDZJ1/S931BXXSDDZJ1

Samsung's release notes and security patch level for this update: SM-S931B / EUX on doc.samsungmobile.com. What each part of the build number means: decode S931BXXSDDZJ1.