Samsung Galaxy Watch5 Pro R920ZCU2DZC1
SM-R920 1 country Wear OS 6.0

Samsung Galaxy Watch5 Pro R920ZCU2DZC1 Firmware

Samsung Galaxy Watch5 Pro R920ZCU2DZC1 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 R920XXU2DZB6, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. A newer build for SM-R920 is available: R920XXS2DZG3.

8.9/10 (27)183 times
Wear OS 6.0
OS Version
2026-03-30
Build Date
2026-02-05
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: R920ZCU2DZC1
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-R920
    CHC China
    		R920CHC2DZC1 2026-03-31 3.191 GiB
    SM-R920_4_20260330145051_qcnqmdjvj7_fac.zip

    No matching downloads

    How to flash R920ZCU2DZC1

    • R920ZCU2DZC1 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 R920ZCU2DZC1

    • 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: February 2026

    SMR Feb-2026 fixes 32 vulnerabilities, 0 of them critical. Android Security Bulletin: 25, Samsung-specific issues (SVE): 7.

    Most severe Samsung fixes:

    • high Improper access control in Emergency Sharing prior to SMR Feb-2026 Release 1 allows local attackers to interrupt its functioning. (CVE-2026-20977)
    • high Improper export of android application components in Samsung Dialer prior to SMR Feb-2026 Release 1 allows local attackers to launch arbitrary activity with Samsung Dialer privilege. (CVE-2026-20983)
    • high Improper authorization in KnoxGuardManager prior to SMR Feb-2026 Release 1 allows local attackers to bypass the persistence configuration of the application. (CVE-2026-20978)

    All fixes and Galaxy models with this patch

    Device specifications

    • Launched withWear OS
    • Display diagonal3.56 cm (1.4")
    • Display technologyOLED
    • Processor frequency1180 MHz
    • RAM1500 MB
    • Flash memory16 GB
    • Battery capacity590 mAh
    • Weight46.5 g
    • Waterproof up to50 m
    • Band colourBlack

    Frequently Asked Questions

    R920ZCU2DZC1 is Wear OS 6.0 firmware for Samsung Galaxy Watch5 Pro, released for China (CHC). It includes the 2026-02-05 security patch. Samsung built it on 2026-03-30.

    SMR Feb-2026 fixes 32 vulnerabilities, 0 of them critical. Android Security Bulletin: 25, Samsung-specific issues (SVE): 7.

    No. A newer build for SM-R920 is available: R920XXS2DZG3. Install it instead of R920ZCU2DZC1 unless you need this exact version. The previous build was R920XXU2DZB6.

    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 3.191 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Watch5 Pro must be on bootloader binary 2 or lower.

    This build uses bootloader binary 2. It can be flashed on a Samsung Galaxy Watch5 Pro 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 Watch5 Pro

    • 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.

    • 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.

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    Model firmware by region