Samsung Galaxy S23 S911BXXSAFZI1
SM-S911B 61 countries Android 16

Samsung Galaxy S23 S911BXXSAFZI1 Firmware

Samsung Galaxy S23 S911BXXSAFZI1 is an Android 16 firmware for 61 countries, 108 CSC codes. It is the same firmware configured per region and carrier (CSC). Find your country below, verify the file and download for free. Compared with the previous build S911BXXSAFZH3: security patch 2026-09-05 instead of 2026-08-05. A newer build for SM-S911B is available: S911BXXUAGZIF.

OS updates guaranteed until: Android 17Security updates until: Jan 31, 2028
Download firmware
8.8/10 (39)24,674 times
Android 16
OS Version
2026-09-09
First release
other regions until 2026-09-11
2026-09-05
Security patch
61
Countries
108
CSC codes
A (10)
Bootloader binary

Bootloader binary A (10). Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

All regional downloads

Pick your region (CSC) to download the matching firmware package.

Paste your current build number from Settings > About phone (About tablet) > Software information, or the output of *#1234#.
    Your CSC is in Settings → About phone (About tablet) → Software information, or dial *#1234#. The CSC sets your region's features and network bands. Download the firmware for your country.
    3
    MODEM/CP Version: S911BXXSAFZE1
    ModelRegionCSC VersionBuild DateRelease dateSizeFile nameDownload
    SM-S911B
    ACR, KSA Saudi Arabia
    AFG Afghanistan
    AFR, DKR Kenya
    BOG, SFR France
    +38 more countries
    CAU, SKZ Kazakhstan
    ECT Nigeria
    EGY Egypt
    EUX, EUY Europe
    EVR United Kingdom
    FWD, MWD Morocco
    GLB, XTC Philippines
    ILO Israel
    INS India
    LYS Libya
    MEO Portugal
    MET Ireland
    MID Iraq
    MM1, SIN, STH, XSP Singapore
    MOB Austria
    MOT, SIM Slovenia
    MSR Serbia
    NPL Nepal
    O2C Czechia
    OPS, TEL, VAU, XSA Australia
    PKD Pakistan
    PLS, PRT Poland
    SEK Ukraine
    SER Russia
    SLK Sri Lanka
    SWC Switzerland
    THL Thailand
    TIM Italy
    TOP Montenegro
    TUN Tunisia
    TUR Turkey
    VIP Croatia
    XFA, XFE, XFV South Africa
    XME Malaysia
    XNZ New Zealand
    XSG United Arab Emirates
    XXV Vietnam
    BTB, BTE, ILP
    		S911BOXMAFZI1 2026-09-09 2026-09-28 14.874 GiB
    SM-S911B_5_20260909105150_9x31s5f5m2_fac.zip
    		Download
    SM-S911B
    ANC, ARO, CTI, PSN, PSP, UFN Argentina
    BVO Bolivia
    CDR, DOR Dominican Republic
    CGU, GTO, PGU Guatemala
    +12 more countries
    CHE, CHL, CHO, CHT, CHX, CRC Chile
    COB, COL, COM, COO Colombia
    CTP, TGP Paraguay
    CTU, UFU, UPO, UYO Uruguay
    EBE, ECO Ecuador
    EON Trinidad & Tobago
    IUS, MXO, TCE, TMM Mexico
    NBS Nicaragua
    PEO, PET, PNT, SAM Peru
    TPA Panama
    ZTA, ZTM, ZTO, ZVV Brazil
    GLO
    		S911BOWOAFZI1 2026-09-11 2026-09-29 15.059 GiB
    SM-S911B_5_20260911000541_2o5upcj8r4_fac.zip
    		Download
    SM-S911B
    XID Indonesia
    		S911BOLEAFZI1 2026-09-10 2026-09-30 14.725 GiB
    SM-S911B_5_20260910202510_epjcjl8kit_fac.zip
    		Download

    No matching downloads

    How to flash S911BXXSAFZI1

    • S911BXXSAFZI1 has bootloader binary A (10). Your device must run binary A (10) or lower: it is the 5th character from the end of your current build number.
    • CSC: Use CSC for a clean install, to change the region (CSC code), to downgrade or to repair a device that does not boot.
    • HOME_CSC: Use HOME_CSC to update the same model and region while keeping your data. Back up anyway: a failed update can still require a reset.
    • The Download Mode key combo depends on the model: see all combos.
    Full flashing guide
    Beware: Manually flashing firmwares may brick your device. Use it at your own risk and follow our tutorial steps.

    What's new in S911BXXSAFZI1

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    Security patch: September 2026

    SMR Sep-2026 fixes 80 vulnerabilities, 20 of them critical. Android Security Bulletin: 58, Samsung Semiconductor: 1, Samsung-specific issues (SVE): 21.

    Most severe Samsung fixes:

    • critical Heap-based buffer overflow in DNG decoder of libimagecodec.quram.so prior to SMR Sep-2026 Release 1 allows remote attackers to execute arbitrary code. (CVE-2026-21095)
    • critical Heap-based buffer overflow in JPEG decoder of libimagecodec.quram.so prior to SMR Sep-2026 Release 1 allows remote attackers to execute arbitrary code. (CVE-2026-21096)
    • high Out-of-bounds write in libmdnie.so prior to SMR Sep-2026 Release 1 allows local attackers to execute arbitrary code with system server privilege. (CVE-2026-21087)

    All fixes and Galaxy models with this patch

    Rollout of S911BXXSAFZI1 by region

    First release
    September 28, 2026
    Last region
    October 1, 2026
    Duration
    4 days
    Regions
    108
    1. Day 1 · · 24 regions
      AustriaMOBCroatiaVIPCzechiaO2CEuropeEUXEUYFranceBOGSFRIrelandMETItalyTIMKazakhstanCAUSKZMontenegroTOPPolandPLSPRTPortugalMEORussiaSER
      +6 more countries
      SerbiaMSRSloveniaMOTSIMSwitzerlandSWCUkraineSEKUnited KingdomEVRBTBBTE
    2. Day 2 · · 11 regions
      ArgentinaAROBoliviaBVOBrazilZTOColombiaCOOGuatemalaGTOMexicoMXOPanamaTPATrinidad & TobagoEONUruguayUPOUYOGLO
    3. Day 3 · · 63 regions
      AfghanistanAFGArgentinaANCCTIPSNPSPAustraliaOPSTELVAUXSAChileCRCColombiaCOBCOLCOMDominican RepublicCDRDOREcuadorEBEECOEgyptEGYGuatemalaCGUPGUIndiaINSIndonesiaXIDIraqMID
      +25 more countries
      IsraelILOKenyaAFRDKRLibyaLYSMalaysiaXMEMexicoIUSTCETMMMoroccoFWDMWDNepalNPLNew ZealandXNZNicaraguaNBSNigeriaECTPakistanPKDParaguayCTPTGPPeruPEOPETPNTSAMPhilippinesGLBXTCSaudi ArabiaACRKSASingaporeMM1SINSTHXSPSouth AfricaXFAXFEXFVSri LankaSLKThailandTHLTunisiaTUNTurkeyTURUnited Arab EmiratesXSGUruguayCTUVietnamXXVILP
    4. Day 4 · · 10 regions
      ArgentinaUFNBrazilZTAZTMZVVChileCHECHLCHOCHTCHXUruguayUFU

    Device specifications

    • Launched withAndroid 13
    • Display diagonal15.5 cm (6.1")
    • Display resolution2340 x 1080 pixels
    • Processor frequency2.8 GHz
    • Processor familySnapdragon
    • Processor model8 Gen 2
    • RAM8 GB
    • Rear camera resolution50 MP
    • Rear camera typeTriple camera
    • SIM cardsDual SIM
    • Battery capacity3900 mAh
    • Weight168 g

    Frequently Asked Questions

    S911BXXSAFZI1 is Android 16 firmware for Samsung Galaxy S23, released for 61 countries, 108 CSC codes. It includes the 2026-09-05 security patch. Samsung built it on 2026-09-09.

    SMR Sep-2026 fixes 80 vulnerabilities, 20 of them critical. Android Security Bulletin: 58, Samsung Semiconductor: 1, Samsung-specific issues (SVE): 21.

    No. A newer build for SM-S911B is available: S911BXXUAGZIF. Install it instead of S911BXXSAFZI1 unless you need this exact version. The previous build was S911BXXSAFZH3.

    Download the package for your region (CSC) and unzip it. In Odin, load each file into the slot with the same name: BL, AP, CP (if the package has one) and CSC, or HOME_CSC to keep your data. Odin checks the built-in checksum of every .tar.md5 file before flashing. The Samsung Galaxy S23 must be on bootloader binary A (10) or lower.

    This build uses bootloader binary A (10). It can be flashed on a Samsung Galaxy S23 running binary A (10) or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 5 other builds of this model use the same binary, so you can switch between them in both directions.

    Other builds and changelog for Samsung Galaxy S23

    One UI 9
    Galaxy AI

    Interpreter keeps your conversation in front of you
    In conversation mode, you can scroll through the whole conversation while you’re still talking.

    Productivity and multitasking

    More customizable quick panel
    You can now rearrange and customize the controls in your quick panel even more than before. You can change the size of the brightness and volume sliders as well as the media player. You can also separate the sound mode button from the volume slider.

    Privacy, sec...

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    One UI 8.5
    Visual design

    Fresh new look
    One UI seamlessly integrates into your daily routine by combining immersive visuals with meaningful personalization for a more refined and sophisticated design. Transparent blur effects add depth and make content easier to navigate, while floating elements react organically to your workflow for a more focused experience. Through familiar and intuitive data visualization, One UI delivers a design that feels both personal and relatable, helping you focus...

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    One UI 8.0 (Android 16)
    Galaxy AI

    See calls on the screen
    Call captions show what each person says on the screen in real time during calls. Follow the conversation on your screen to make sure you don’t miss anything.

    Create unique pet portraits
    Bring out your pet's personality with Portrait studio. You can now apply portrait effects to pictures of dogs and cats in addition to people. Choose from styles like Fisheye lens, oil painting, and more.

    Translate emergency alerts
    Never miss importa...

    Show 5 older builds

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    • Security
    The device is protected with improved security.

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    • Security
    The device is protected with improved security.

    Model firmware by region