Samsung Galaxy S21 Ultra 5G G9980ZCSFHYL1
SM-G9980 1 country Android 15

Samsung Galaxy S21 Ultra 5G G9980ZCSFHYL1 Firmware

Samsung Galaxy S21 Ultra 5G G9980ZCSFHYL1 is an Android 15 firmware for China (CHC). 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 G9980ZHSFHYL1, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. A newer build for SM-G9980 is available: G9980ZCUGHZE1.

OS updates guaranteed until: Android 15Security updates until: Jan 31, 2026
Download firmware
8.9/10 (179)1,182 times
Android 15
OS Version
2025-12-29
Build Date
2025-12-01
Security patch
1
Countries
1
CSC codes
F (15)
Bootloader binary

Bootloader binary F (15). Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy S21 Ultra 5G use bootloader binary G (16) (latest: G9980ZCUGHZE1). If your device already runs binary G (16), 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: G9980ZCSFHYL1
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-G9980
    CHC China
    		G9980CHCFHYL1 2025-12-30 9.822 GiB
    SM-G9980_5_20251223154741_os6pgyigs2_fac.zip
    		Download

    No matching downloads

    How to flash G9980ZCSFHYL1

    • G9980ZCSFHYL1 has bootloader binary F (15). Your device must run binary F (15) 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 G9980ZCSFHYL1

    • 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: December 2025

    SMR Dec-2025 fixes 65 vulnerabilities, 6 of them critical. Android Security Bulletin: 57, Samsung-specific issues (SVE): 8.

    Most severe Samsung fixes:

    • high Out-of-bounds write in decoding metadata in fingerprint trustlet (CVE-2025-21072)
    • high Out-of-bounds write in libimagecodec.quram.so (CVE-2025-58477)
    • high Out-of-bounds write in libimagecodec.quram.so (CVE-2025-58478)

    All fixes and Galaxy models with this patch

    Device specifications

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

    Specifications of SM-G998, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    G9980ZCSFHYL1 is Android 15 firmware for Samsung Galaxy S21 Ultra 5G, released for China (CHC). It includes the 2025-12-01 security patch. Samsung built it on 2025-12-29.

    SMR Dec-2025 fixes 65 vulnerabilities, 6 of them critical. Android Security Bulletin: 57, Samsung-specific issues (SVE): 8.

    No. A newer build for SM-G9980 is available: G9980ZCUGHZE1. Install it instead of G9980ZCSFHYL1 unless you need this exact version. The previous build was G9980ZHSFHYL1.

    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 9.822 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy S21 Ultra 5G must be on bootloader binary F (15) or lower.

    This build uses bootloader binary F (15). It can be flashed on a Samsung Galaxy S21 Ultra 5G running binary F (15) or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 1 other build of this model uses 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.

    No changelog details available.

    • Security
    The device is protected with improved security.

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

    No changelog details available.
    Show 11 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.

    No changelog details available.
    • 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 7.0 Upgrade (Android 15)
    Bold new look

    Visual enhancements
    Enjoy a more sophisticated and unique look. One UI 7 introduces a stunning redesign to key components including buttons, menus, notifications and control bars, providing a more consistent visual experience with curves and circles. Beautiful new colors, soft animations, and an innovative blur effect that's unique to One UI make information hierarchy clearer and help you focus on important information.

    Reimagined Home screen
    Fr...

    • The latest Android security patch has been applied.
    - Device security has been further enhanced.

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