Samsung Galaxy S21 Ultra 5G G998BXXSAFXCP
SM-G998B 3 countries Android 14

Samsung Galaxy S21 Ultra 5G G998BXXSAFXCP Firmware

Samsung Galaxy S21 Ultra 5G G998BXXSAFXCP is an Android 14 firmware for Australia (OPS, TEL, VAU, XSA), Singapore (MM1, SIN, STH, XSP), Vietnam (XXV). 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 G998BXXSAFXCO, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. A newer build for SM-G998B is available: G998BXXUJHZF2.

OS updates guaranteed until: Android 15Security updates until: Jan 2, 2026
Download firmware
8.7/10 (477)26,845 times
Android 14
OS Version
2024-04-11
First release
other regions until 2024-04-17
2024-04-01
Security patch
3
Countries
9
CSC codes
A (10)
Bootloader binary

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

Newer builds of Samsung Galaxy S21 Ultra 5G use bootloader binary J (19) (latest: G998BXXUJHZF2). If your device already runs binary J (19), 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: G998BXXSAFXCL
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-G998B
    MM1, SIN, STH, XSP Singapore
    OPS, TEL, VAU, XSA Australia
    XXV Vietnam
    		G998BOXMAFXCP 2024-04-12 8.161 GiB
    SM-G998B_4_20240402132620_ydmxgdji0a_fac.zip
    		Download

    No matching downloads

    How to flash G998BXXSAFXCP

    • G998BXXSAFXCP 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 G998BXXSAFXCP

    • Security
    The device is protected with improved security.

    Security patch: April 2024

    SMR Apr-2024 fixes 35 vulnerabilities, 1 of them critical. Android Security Bulletin: 27, Samsung-specific issues (SVE): 8.

    Most severe Samsung fixes:

    • high Out-of-bounds write vulnerability in libsavsac.so (CVE-2024-20844)
    • high Out-of-bounds write vulnerability in libsavsac.so (CVE-2024-20845)
    • high Out-of-bounds Write vulnerability in libsdffextractor (CVE-2024-20849)

    All fixes and Galaxy models with this patch

    Rollout of G998BXXSAFXCP by region

    First release
    April 12, 2024
    Last region
    April 17, 2024
    Duration
    6 days
    Regions
    9
    1. Day 1 · · 1 region
      VietnamXXV
    2. Day 4 · · 4 regions
      SingaporeMM1SINSTHXSP
    3. Day 6 · · 4 regions
      AustraliaOPSTELVAUXSA

    Device specifications

    • Launched withAndroid 11
    • Display diagonal17.3 cm (6.8")
    • Display resolution3200 x 1440 pixels
    • Display typeDynamic AMOLED 2X
    • Processor frequency2.9 GHz
    • Processor familySamsung Exynos
    • RAM12 GB
    • Rear camera resolution108 MP
    • Rear camera typeQuad camera
    • SIM cardsDual SIM
    • Battery capacity5000 mAh
    • Weight228 g

    Frequently Asked Questions

    G998BXXSAFXCP is Android 14 firmware for Samsung Galaxy S21 Ultra 5G, released for Australia (OPS, TEL, VAU, XSA), Singapore (MM1, SIN, STH, XSP), Vietnam (XXV). It includes the 2024-04-01 security patch. Samsung built it on 2024-04-11.

    SMR Apr-2024 fixes 35 vulnerabilities, 1 of them critical. Android Security Bulletin: 27, Samsung-specific issues (SVE): 8.

    No. A newer build for SM-G998B is available: G998BXXUJHZF2. Install it instead of G998BXXSAFXCP unless you need this exact version. The previous build was G998BXXSAFXCO.

    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 8.161 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy S21 Ultra 5G must be on bootloader binary A (10) or lower.

    This build uses bootloader binary A (10). It can be flashed on a Samsung Galaxy S21 Ultra 5G running binary A (10) or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 7 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 S21 Ultra 5G

    • Stability and reliability
    Device behavior has been improved.

    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.

    · Device stability improvements, bug fixes.
    · New and / or enhanced features.
    · Further improvements to performance.

    • Security
    The device is protected with improved security.

    • The security of your device has been improved.

    Show 12 older builds
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    • The security of your device has been improved.

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    • The security of your device has been improved.

    • Security
    The device is protected with improved security.

    • The security of your device has been improved.

    • Stability and reliability
    Device behavior has been improved.
    • Security
    The device is protected with improved security.

    Model firmware by region