Samsung Galaxy Watch7 L300XXU2BZB1
SM-L300 2 countries Wear OS 6.0

Samsung Galaxy Watch7 L300XXU2BZB1 Firmware

Samsung Galaxy Watch7 L300XXU2BZB1 is an Wear OS 6.0 firmware for Japan (XJP), Singapore (XSP). 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 L300XXU1BYK1: bootloader binary raised from 1 to 2, so after installing it there is no way back to older builds; security patch 2026-02-05 instead of 2025-11-01. A newer build for SM-L300 is available: L300XXS2BZF4.

9.1/10 (29)863 times
Wear OS 6.0
OS Version
2026-03-04
Build Date
2026-02-05
Security patch
2
Countries
2
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#.
    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.
    MODEM/CP Version: L300XXU2BZB1
    ModelRegionCSC VersionBuild DateRelease dateSizeFile nameDownload
    SM-L300
    XJP Japan
    		L300SJP2BZB1 2026-03-04 — 3.59 GiB
    SM-L300_2_20260304154711_9yw459srdy_fac.zip
    SM-L300
    XSP Singapore
    		L300OXM2BZB1 — 2026-03-05 3.717 GiB
    SM-L300_2_20260226065611_pnh71xx1pa_fac.zip

    No matching downloads

    Device specifications

    • Launched withWear OS
    • Display diagonal3.3 cm (1.3")
    • Display technologyAMOLED
    • Display resolution432 x 432 pixels
    • RAM2 MB
    • Battery capacity300 mAh
    • Weight28.8 g
    • Band colourGreen
    • Band sizeS/M

    Specifications of SM-L300N, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    What's new in L300XXU2BZB1

    • 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.

    How to flash L300XXU2BZB1

    • L300XXU2BZB1 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.

    Frequently Asked Questions

    L300XXU2BZB1 is Wear OS 6.0 firmware for Samsung Galaxy Watch7, released for Japan (XJP), Singapore (XSP). It includes the 2026-02-05 security patch. Samsung built it on 2026-03-04.

    No. A newer build for SM-L300 is available: L300XXS2BZF4. Install it instead of L300XXU2BZB1 unless you need this exact version. The previous build was L300XXU1BYK1.

    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 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". 3 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.

    • 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.

    • 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.

    • 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.

    Show 6 older builds
    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.

    • 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.

    • Stability and reliability
    - Battery charging stability has been improved.
    - Battery stability has been improved.
    - Overall device stability has been improved.

    Model firmware by region