SM-R905U 1 country Wear OS 6

Samsung Galaxy Watch5 R905USQU1CYCD Firmware

Samsung Galaxy Watch5 R905USQU1CYCD is an Wear OS 6 firmware for United States (XAA). 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 R905USQU1CXK2: security patch 2025-03-01 instead of 2024-10-01. A newer build for SM-R905U is available: R905USQS2DZG3.

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Wear OS 6
OS Version
2025-06-04
Build Date
2025-03-01
Security patch
1
Countries
1
CSC codes
1
Bootloader binary

Bootloader binary 1. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy Watch5 use bootloader binary 2 (latest: R905USQS2DZG3). If your device already runs binary 2, 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: R905USQU1CYCD
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-R905U
    XAA United States
    		R905UOYM1CYCD 2025-06-04 3.155 GiB
    SM-R905U_3_20250604182721_jk0vpev02l_fac.zip

    No matching downloads

    Device specifications

    • Launched withWear OS
    • Display diagonal3.05 cm (1.2")
    • Display technologyOLED
    • Display resolution396 x 396 pixels
    • RAM1500 MB
    • Flash memory16 GB
    • Battery capacity284 mAh
    • Weight28.7 g
    • Waterproof up to50 m
    • Band colourPink gold

    Specifications of SM-R905F, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    What's new in R905USQU1CYCD

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

    How to flash R905USQU1CYCD

    • R905USQU1CYCD has bootloader binary 1. Your device must run binary 1 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

    R905USQU1CYCD is Wear OS 6 firmware for Samsung Galaxy Watch5, released for United States (XAA). It includes the 2025-03-01 security patch. Samsung built it on 2025-06-04.

    No. A newer build for SM-R905U is available: R905USQS2DZG3. Install it instead of R905USQU1CYCD unless you need this exact version. The previous build was R905USQU1CXK2.

    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 3.155 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Watch5 must be on bootloader binary 1 or lower.

    This build uses bootloader binary 1. It can be flashed on a Samsung Galaxy Watch5 running binary 1 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

    • 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.

    • 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...

    • Stability and reliability
    Device behavior has been improved.

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

    Show 5 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.

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

    One UI 6 Watch Upgrade
    A new look for your watch

    Discover new watch faces
    Express your individual style with these new premium watch faces. Spatial Number provides an analog clock on top of large bold digits. Simple Digital is for people who prefer a minimalist design. Ultra Info Board lets you quickly check your workout information. You can find these watch faces in the new featured watch faces section of the Galaxy Wearable app. You can also browse watch faces by keyword including colors,...

    • Workout Tracker Support
    By connecting your Galaxy Watch to your Samsung TV, you can view workout data from your watch on your TV screen.
    ※ Supported products and connection requirements
    . Supports Samsung TV/Smart Monitor/Projector/Life Style products that are newly released from 2024. However, this may vary depending on Samsung policy.
    . It is supported on the condition that the same Samsung account is registered on both the Samsung TV and the Galaxy Watch.
    . For more information, please v...

    • Stability and reliability
    The stability has been improved.

    Model firmware by region