Samsung Galaxy S24 S921BXXU2AXEC
SM-S921B 13 countries Android 14

Samsung Galaxy S24 S921BXXU2AXEC Firmware

Samsung Galaxy S24 S921BXXU2AXEC is an Android 14 firmware for 13 countries, 17 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 S921BXXS2AXD6, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. A newer build for SM-S921B is available: S921BXXSIEZJ1.

OS updates guaranteed until: Android 21Security updates until: Jan 1, 2031
Download firmware
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Android 14
OS Version
2024-06-11
Build Date
2024-05-01
Security patch
13
Countries
17
CSC codes
2
Bootloader binary

Bootloader binary 2. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy S24 use bootloader binary I (18) (latest: S921BXXSIEZJ1). If your device already runs binary I (18), this build cannot be flashed.

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#.
    MODEM/CP Version: S921BXXU2AXEC
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-S921B
    BOG, SFR France
    EUX, EUY Europe
    EVR United Kingdom
    MEO Portugal
    +9 more countries
    MET Ireland
    MOB Austria
    MOT, SIM Slovenia
    MSR Serbia
    O2C Czechia
    PLS, PRT Poland
    SWC Switzerland
    TOP Montenegro
    VIP Croatia
    		S921BOXM2AXEC 2024-06-11 14.213 GiB
    SM-S921B_1_20240525205021_7ye968zqqt_fac.zip
    		Download

    No matching downloads

    How to flash S921BXXU2AXEC

    • S921BXXU2AXEC has bootloader binary 2. Your device must run binary 2 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 S921BXXU2AXEC

    • Overall stability of functions improved.
    • The security of your device has been improved.

    Security patch: May 2024

    SMR May-2024 fixes 42 vulnerabilities, 3 of them critical. Android Security Bulletin: 30, Samsung-specific issues (SVE): 12.

    Most severe Samsung fixes:

    • high Authentication bypass in bootloader (CVE-2024-20865)

    All fixes and Galaxy models with this patch

    Rollout of S921BXXU2AXEC by region

    Samsung released this build in all regions (17) on the same day, June 11, 2024.

    Device specifications

    • Launched withAndroid 14
    • Display diagonal15.8 cm (6.2")
    • Display resolution2340 x 1080 pixels
    • Processor frequency2.9 GHz
    • Processor familySamsung Exynos
    • Processor model2400
    • RAM8 GB
    • RAM typeLPDDR5X
    • Rear camera resolution50 MP
    • Rear camera typeTriple camera
    • SIM cardsDual SIM
    • Battery capacity4000 mAh
    • Weight167 g

    Frequently Asked Questions

    S921BXXU2AXEC is Android 14 firmware for Samsung Galaxy S24, released for 13 countries, 17 CSC codes. It includes the 2024-05-01 security patch. Samsung built it on 2024-06-11.

    SMR May-2024 fixes 42 vulnerabilities, 3 of them critical. Android Security Bulletin: 30, Samsung-specific issues (SVE): 12.

    No. A newer build for SM-S921B is available: S921BXXSIEZJ1. Install it instead of S921BXXU2AXEC unless you need this exact version. The previous build was S921BXXS2AXD6.

    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 download is 14.213 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy S24 must be on bootloader binary 2 or lower.

    This build uses bootloader binary 2. It can be flashed on a Samsung Galaxy S24 running binary 2 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 4 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 S24

    • 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 9
    Galaxy AI

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    Now nudge provides helpful suggestions in more places throughout your Galaxy experience. In addition to the keyboard, suggestions will now appear in conversation notifications and in a floating button in the bottom right corner of the screen. There are also several new types of suggestions, like addresses or saving places in Google Maps.

    Focus on someone important
    My FanCam lets you select a person in a video and follow them automatically while cropping...

    • 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.

    Show 10 older builds

    • Stability and reliability
    Device behavior has been improved.
    • 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.

    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.

    Clean up sound
    Use Audio eraser to automatica...

    • Security
    The device is protected with improved security.

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

    Model firmware by region