Galaxy S24 SM-S921B firmware

The latest stable build is S921BXXSIEZJ1 (Android 17, security update), first released on Oct 26, 2026 – 11 days ago. Samsung has published 70 stable builds for this model since Jan 18, 2024: 50 security and 20 feature updates, from Android 14 to Android 17. The current bootloader (binary) version is 18. A device on bit 18 only accepts firmware with bit 18 or higher – see downgrading and the bootloader bit.

Latest build
S921BXXSIEZJ1
Released
Oct 26, 2026
Android
Android 17
Bootloader bit
18
Regions
95
Stable builds
70

Latest firmware by region (CSC)

Samsung builds firmware per region code (CSC). Pick the code that matches your device – it is shown under Settings › About phone › Software information › Service provider software version. Follow a code for its complete history.

CSCRegionLatest buildAndroidReleasedBuilds
ACRGhanaS921BXXSIEZJ1Android 17Oct 26, 202637
AFGAfghanistanS921BXXSIEZJ1Android 17Oct 26, 202637
AFRAfricaS921BXXSIEZJ1Android 17Oct 26, 202637
AROArgentinaS921BXXUHEZIFAndroid 17Oct 30, 202636
BOGFrance (Bouygues)S921BXXSIEZJ1Android 17Oct 26, 202643
BVOBoliviaS921BXXSIEZJ1Android 17Oct 29, 202637
CAUCaucasusS921BXXSIEZJ1Android 17Oct 26, 202638
CDRDominican RepublicS921BXXUHEZIFAndroid 17Nov 6, 202636
CGUGuatemala (Claro)S921BXXUHEZIFAndroid 17Oct 30, 202636
CHEChile (Entel)S921BXXSHDZI1Android 16Oct 9, 202634
CHLChile (Claro)S921BXXSHDZI1Android 16Oct 9, 202634
CHOChileS921BXXSHDZI1Android 16Oct 9, 202634
CHTChile (Movistar)S921BXXSHDZI1Android 16Oct 9, 202634
CHXChileS921BXXSHDZI1Android 16Oct 9, 202634
COBColombia (Movistar)S921BXXUHEZIFAndroid 17Oct 16, 202636
COLColombiaS921BXXUHEZIFAndroid 17Oct 16, 202636
COMColombia (Claro)S921BXXSHDZI1Android 16Oct 8, 202633
COOColombiaS921BXXUHEZIFAndroid 17Oct 16, 202636
CRCCosta RicaS921BXXUHEZIFAndroid 17Oct 30, 202636
CTIArgentina (Claro)S921BXXUHEZIFAndroid 17Oct 30, 202636
DKRSenegalS921BXXSIEZJ1Android 17Oct 26, 202637
DORDominican RepublicS921BXXUHEZIFAndroid 17Oct 30, 202636
EBEEcuadorS921BXXUHEZIFAndroid 17Oct 28, 202631
ECOEcuadorS921BXXUHEZIFAndroid 17Oct 28, 202631
ECTNigeriaS921BXXSIEZJ1Android 17Oct 26, 202637
EGYEgyptS921BXXSIEZJ1Android 17Oct 26, 202637
EUXEurope (Multi-CSC)S921BXXSIEZJ1Android 17Oct 26, 202648
EUYEurope (Multi-CSC)S921BXXSIEZJ1Android 17Oct 26, 202643
EVRUnited Kingdom (EE)S921BXXSIEZJ1Android 17Oct 26, 202643
GLBPhilippines (Globe)S921BXXSIEZJ1Android 17Oct 26, 202638
GLONigeria (Glo)S921BXXUHEZIFAndroid 17Oct 30, 202636
GTOGuatemalaS921BXXSIEZJ1Android 17Oct 29, 202637
ILOIsraelS921BXXSIEZJ1Android 17Oct 26, 202637
INSIndiaS921BXXSIEZJ1Android 17Oct 26, 202639
IUSMexico (AT&T)S921BXXSIEZJ1Android 17Nov 6, 202637
KSASaudi ArabiaS921BXXSIEZJ1Android 17Oct 26, 202637
LYSLibyaS921BXXSIEZJ1Android 17Oct 26, 202637
MEOPortugal (MEO)S921BXXSIEZJ1Android 17Oct 26, 202643
MIDMiddle EastS921BXXSIEZJ1Android 17Oct 26, 202637
MM1Singapore (M1)S921BXXSIEZJ1Android 17Oct 26, 202637
MOBAustria (A1)S921BXXSIEZJ1Android 17Oct 26, 202643
MOTSlovenia (Telekom)S921BXXSIEZJ1Android 17Oct 26, 202643
MSRSerbiaS921BXXSIEZJ1Android 17Oct 26, 202643
MWDMoroccoS921BXXSIEZJ1Android 17Oct 26, 202637
MXOMexicoS921BXXSIEZJ1Android 17Nov 6, 202637
NPBNepalS921BXXSIEZJ1Android 17Oct 26, 202637
O2CCzech Republic (O2)S921BXXSIEZJ1Android 17Oct 26, 202643
OPSAustralia (Optus)S921BXXSIEZJ1Android 17Oct 26, 202637
PAKPakistanS921BXXSIEZJ1Android 17Oct 26, 202637
PEOPeruS921BXXUHEZIFAndroid 17Nov 6, 202636
PETPeru (Movistar)S921BXXUHEZIFAndroid 17Nov 6, 202636
PGUGuatemalaS921BXXUHEZIFAndroid 17Oct 30, 202636
PKDPakistanS921BXXSIEZJ1Android 17Oct 26, 202637
PLSPoland (Plus)S921BXXSIEZJ1Android 17Oct 26, 202643
PNTPanamaS921BXXUHEZIFAndroid 17Nov 6, 202636
PRTPoland (Play)S921BXXSIEZJ1Android 17Oct 26, 202643
PSNArgentina (Personal)S921BXXUHEZIFAndroid 17Oct 30, 202636
SAMOceaniaS921BXXUHEZIFAndroid 17Nov 6, 202636
SERRussiaS921BXXSIEZJ1Android 17Oct 26, 202638
SFRFrance (SFR)S921BXXSIEZJ1Android 17Oct 26, 202643
SIMSlovenia (A1)S921BXXSIEZJ1Android 17Oct 26, 202643
SINSingapore (Singtel)S921BXXSIEZJ1Android 17Oct 26, 202637
SKZKazakhstanS921BXXSIEZJ1Android 17Oct 26, 202638
SLKSri LankaS921BXXSIEZJ1Android 17Oct 26, 202637
STHSingapore (StarHub)S921BXXSIEZJ1Android 17Oct 26, 202637
SWCSwitzerlandS921BXXSIEZJ1Android 17Oct 26, 202643
TCEMexico (Telcel)S921BXXSIEZJ1Android 17Nov 6, 202637
TELAustralia (Telstra)S921BXXSIEZJ1Android 17Oct 26, 202637
TGPParaguayS921BXXUHEZIFAndroid 17Nov 5, 202636
THLThailandS921BXXSIEZJ1Android 17Oct 26, 202638
TMMMyanmarS921BXXSIEZJ1Android 17Nov 6, 202637
TOPSerbia/MontenegroS921BXXSIEZJ1Android 17Oct 26, 202643
TPAPanamaS921BXXSIEZJ1Android 17Oct 29, 202637
TUNTunisiaS921BXXSIEZJ1Android 17Oct 26, 202637
TURTurkeyS921BXXSIEZJ1Android 17Oct 26, 202637
UFNArgentina (Movistar)S921BXXUHEZIFAndroid 17Oct 30, 202636
UPOUruguayS921BXXUHEZIFAndroid 17Nov 5, 202636
UYOUruguayS921BXXSHDZI1Android 16Oct 8, 202635
VAUAustralia (Vodafone)S921BXXSIEZJ1Android 17Oct 26, 202637
VIPCroatia (A1)S921BXXSIEZJ1Android 17Oct 26, 202643
XFASouth AfricaS921BXXSIEZJ1Android 17Oct 26, 202637
XFESouth AfricaS921BXXSIEZJ1Android 17Oct 26, 202637
XFVSouth Africa (Vodacom)S921BXXSIEZJ1Android 17Oct 26, 202637
XIDIndonesiaS921BXXSIEZJ1Android 17Oct 26, 202637
XMEMalaysiaS921BXXSIEZJ1Android 17Oct 26, 202638
XNZNew ZealandS921BXXSIEZJ1Android 17Oct 26, 202638
XSAAustraliaS921BXXSIEZJ1Android 17Oct 26, 202637
XSGUnited Arab EmiratesS921BXXSIEZJ1Android 17Oct 26, 202637
XSPSingaporeS921BXXSIEZJ1Android 17Oct 26, 202637
XTCPhilippinesS921BXXSIEZJ1Android 17Oct 26, 202638
XXVVietnamS921BXXSIEZJ1Android 17Oct 26, 202638
ZTABrazil (Claro)S921BXXSIEZJ1Android 17Nov 6, 202637
ZTMBrazil (TIM)S921BXXSIEZJ1Android 17Nov 6, 202637
ZTOBrazilS921BXXSIEZJ1Android 17Nov 6, 202637
ZVVBrazil (Vivo)S921BXXSIEZJ1Android 17Nov 6, 202637

Firmware history (70 builds)

Every stable build (PDA version) Samsung has published for the SM-S921B, newest first. “” is the earliest date the build appeared on Samsung's servers in any region. “” means Samsung no longer serves the file for that build.

Build (PDA)ReleasedAndroidTypeBitRegionsFile
S921BXXSIEZJ1Oct 26, 2026Android 17Security1867on server
S921BXXUHEZIFOct 12, 2026Android 17Feature1788on server
S921BXXSHDZI1Sep 28, 2026Android 16Security1795on server
S921BXXSHDZH3Aug 31, 2026Android 16Security1795on server
S921BXXSGDZG1Jul 20, 2026Android 16Security1695on server
S921BXXSFDZF3Jun 23, 2026Android 16Security151on server
S921BXXSFDZF2Jun 22, 2026Android 16Security1594on server
S921BXXSFDZE1Jun 1, 2026Android 16Security1595on server
S921BXXUEDZDRMay 18, 2026Android 16Feature1495on server
S921BXXSECZD1Apr 20, 2026Android 16Security1495on server
S921BXXUDCZC2Mar 26, 2026Android 16Feature1395on server
S921BXXSDCZB2Mar 3, 2026Android 16Security1395on server
S921BXXSCCZA1Jan 21, 2026Android 16Security1295on server
S921BXXSBCYK8Dec 16, 2025Android 16Security1195on server
S921BXXSBCYK2Nov 24, 2025Android 16Security1195on server
S921BXXSACYJ7Oct 28, 2025Android 16Security1095on server
S921BXXSACYJ1Oct 15, 2025Android 16Security105on server
S921BXXU9CYI5Sep 25, 2025Android 16Feature987on server
S921BXXS9BYH4Aug 21, 2025Android 15Security91on server
S921BXXS9BYH3Aug 20, 2025Android 15Security939on server
S921BXXS9BYH1Aug 11, 2025Android 15Security937on server
S921BXXS9BYH2Aug 11, 2025Android 15Security919on server
S921BXXS8BYG3Jul 16, 2025Android 15Security839on server
S921BXXS8BYG1Jul 15, 2025Android 15Security837on server
S921BXXS8BYG2Jul 15, 2025Android 15Security819on server
S921BXXS7BYEDJun 18, 2025Android 15Security739on server
S921BXXS7BYECJun 16, 2025Android 15Security719on server
S921BXXS7BYEBJun 16, 2025Android 15Security737on server
S921BXXU6BYE7May 28, 2025Android 15Feature619on server
S921BXXS6BYE6May 27, 2025Android 15Security639on server
S921BXXS6BYE3May 22, 2025Android 15Security656on server
S921BXXU5BYDAApr 24, 2025Android 15Feature539on server
S921BXXU5BYD9Apr 23, 2025Android 15Feature556on server
S921BXXU5AYB3Apr 16, 2025Android 14Feature53on server
S921BXXU5BYCGApr 10, 2025Android 15Feature516on server
S921BXXS5AYB8Mar 17, 2025Android 14Security519on server
S921BXXS5AYB7Mar 17, 2025Android 14Security557on server
S921BXXS5AYB6Mar 17, 2025Android 14Security516on server
S921BXXS5AYB1Feb 25, 2025Android 14Security519on server
S921BXXS5AYAAFeb 19, 2025Android 14Security557on server
S921BXXS5AYB2Feb 17, 2025Android 14Security516on server
S921BXXU5AYA5Feb 5, 2025Android 14Feature516on server
S921BXXS5AYA2Jan 23, 2025Android 14Security519on server
S921BXXS5AYA1Jan 23, 2025Android 14Security558on server
S921BXXS5AXKBDec 19, 2024Android 14Security519on server
S921BXXS5AXKADec 11, 2024Android 14Security574on server
S921BXXU5AXK5Nov 28, 2024Android 14Feature519on server
S921BXXU5AXK4Nov 27, 2024Android 14Feature574on server
S921BXXS5AXJ8Nov 4, 2024Android 14Security516on server
S921BXXS4AXI8Oct 10, 2024Android 14Security495on server
S921BXXS3AXHDSep 25, 2024Android 14Security395on server
S921BXXU3AXH7Sep 9, 2024Android 14Feature395on server
S921BXXS3AXGDAug 12, 2024Android 14Security379on server
S921BXXS3AXGFAug 8, 2024Android 14Security316on server
S921BXXS3AXFEJul 16, 2024Android 14Security316on server
S921BXXS3AXFCJul 16, 2024Android 14Security379on server
S921BXXS2AXEFJun 13, 2024Android 14Security216on server
S921BXXS2AXEDJun 12, 2024Android 14Security279on server
S921BXXU2AXECJun 11, 2024Android 14Feature216on server
S921BXXS2AXD5May 16, 2024Android 14Security279on server
S921BXXS2AXD6May 10, 2024Android 14Security216on server
S921BXXU1AXCBApr 23, 2024Android 14Feature116on server
S921BXXU1AXCAMar 26, 2024Android 14Feature195on server
S921BXXS1AXBNMar 12, 2024Android 14Security131on server
S921BXXS1AXBLMar 5, 2024Android 14Security139on server
S921BXXS1AXBGMar 1, 2024Android 14Security125on server
S921BXXU1AXBAFeb 26, 2024Android 14Feature131on server
S921BXXU1AXB7Feb 23, 2024Android 14Feature139on server
S921BXXU1AXB5Feb 23, 2024Android 14Feature125on server
S921BXXU1AWM9Jan 18, 2024Android 14Feature195on server

Beta and test builds

Samsung's servers also list 5 beta build(s) for this model. They are not offered to regular users and are often removed after the next stable release.

BuildListedFile
S921BXXUHZZI4Sep 14, 2026pulled
S921BXXUHZZHLSep 3, 2026pulled
S921BXXUDZZD5Apr 22, 2026pulled
S921BXXUEZZDDApr 22, 2026pulled
S921BXXUDZZCDMar 26, 2026pulled

How to download SM-S921B firmware

We do not host firmware. Download it directly from Samsung's servers with a free open-source tool, for example samloader:

samloader download -m SM-S921B -r ACR

Replace ACR with your region code. Step-by-step instructions, including a graphical alternative: How to download Samsung firmware.