Samsung Galaxy Watch6 Classic R9650ZCU2CZB5
SM-R9650 1 country Wear OS 6.0

Samsung Galaxy Watch6 Classic R9650ZCU2CZB5 Firmware

Samsung Galaxy Watch6 Classic R9650ZCU2CZB5 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 R9650ZCS1CZA1: bootloader binary raised from 1 to 2, so after installing it there is no way back to older builds. A newer build for SM-R9650 is available: R9650ZCS2CZF5.

9.4/10 (27)52 times
Wear OS 6.0
OS Version
2026-02-12
Build Date
2026-01-01
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: R9650ZCU2CZB5
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-R9650
    CHC China
    		R9650CHC2CZB5 2026-03-09 3.244 GiB
    SM-R9650_3_20260212151951_0mcwj7e4vu_fac.zip

    No matching downloads

    What's new in R9650ZCU2CZB5

    • Stability and reliability
    Device behavior has been improved.

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

    How to flash R9650ZCU2CZB5

    • R9650ZCU2CZB5 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

    R9650ZCU2CZB5 is Wear OS 6.0 firmware for Samsung Galaxy Watch6 Classic, released for China (CHC). It includes the 2026-01-01 security patch. Samsung built it on 2026-02-12.

    No. A newer build for SM-R9650 is available: R9650ZCS2CZF5. Install it instead of R9650ZCU2CZB5 unless you need this exact version. The previous build was R9650ZCS1CZA1.

    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 3.244 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Watch6 Classic must be on bootloader binary 2 or lower.

    This build uses bootloader binary 2. It can be flashed on a Samsung Galaxy Watch6 Classic 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 Watch6 Classic

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

    • 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.

    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.

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    • 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.

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

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    • Stability and reliability
    Stabilization codes for touch-screen operation have been applied.

    Model firmware by region