Samsung Galaxy Watch7 L310ZCU2BZB5
SM-L310 1 country Wear OS 6.0

Samsung Galaxy Watch7 L310ZCU2BZB5 Firmware

Samsung Galaxy Watch7 L310ZCU2BZB5 is an Wear OS 6.0 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 L310XXU2BZB1, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. A newer build for SM-L310 is available: L310XXS2BZF4.

9.3/10 (38)176 times
Wear OS 6.0
OS Version
2026-02-12
Build Date
2025-11-01
Security patch
1
Countries
1
CSC codes
2
Bootloader binary

Bootloader binary 2. 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#.
    MODEM/CP Version: L310ZCU2BZB5
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-L310
    CHC China
    		L310CHC2BZB5 2026-03-09 3.359 GiB
    SM-L310_2_20260212150410_f1dohiq839_fac.zip

    No matching downloads

    How to flash L310ZCU2BZB5

    • L310ZCU2BZB5 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 L310ZCU2BZB5

    • 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 patch: November 2025

    SMR Nov-2025 fixes 33 vulnerabilities, 2 of them critical. Android Security Bulletin: 24, Samsung Semiconductor: 5, Samsung-specific issues (SVE): 4.

    Most severe Samsung fixes:

    • high Out-of-bounds write in handling opcode in fingerprint trustlet (CVE-2025-21071)
    • high Out-of-bounds read in libimagecodec.quram.so (CVE-2025-21074)
    • high Out-of-bounds write in libimagecodec.quram.so (CVE-2025-21075)

    All fixes and Galaxy models with this patch

    Device specifications

    • Launched withWear OS
    • Display diagonal3.81 cm (1.5")
    • Display technologyAMOLED
    • Display resolution480 x 480 pixels
    • RAM2 MB
    • Battery capacity425 mAh
    • Weight33.8 g
    • Band colourSilver
    • Band sizeM/L

    Specifications of SM-L310N, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    L310ZCU2BZB5 is Wear OS 6.0 firmware for Samsung Galaxy Watch7, released for China (CHC). It includes the 2025-11-01 security patch. Samsung built it on 2026-02-12.

    SMR Nov-2025 fixes 33 vulnerabilities, 2 of them critical. Android Security Bulletin: 24, Samsung Semiconductor: 5, Samsung-specific issues (SVE): 4.

    No. A newer build for SM-L310 is available: L310XXS2BZF4. Install it instead of L310ZCU2BZB5 unless you need this exact version. The previous build was L310XXU2BZB1.

    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 3.359 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Watch7 must be on bootloader binary 2 or lower.

    This build uses bootloader binary 2. It can be flashed on a Samsung Galaxy Watch7 running binary 2 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 6 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 Watch7

    • Security
    The device is protected with improved security.

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

    • Stability and reliability
    Device behavior has been improved.

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

    • 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.

    One UI 8 Watch Upgrade
    Get things done

    Stay on top of important tasks with the Now bar
    Check the information you need right now and start essential features straight from your watch face. Ongoing tasks will appear in the Now bar at the bottom of your watch face so you can check key information quickly.

    Do more with double pinch
    Just pinch your thumb and index finger together twice to scroll through notifications, control music, take pictures, and more. You can also customize what happens wh...

    • 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 8 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.

    • The usability of device operations has been improved.

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

    • Stability and reliability
    The stability has been improved.

    • Stability and reliability
    The stability has been improved.
    • Google Security patch
    The device is protected with improved security.

    Model firmware by region