Samsung Galaxy Watch FE R861XXU1BYJ1
SM-R861 66 countries Wear OS 6

Samsung Galaxy Watch FE R861XXU1BYJ1 Firmware

Samsung Galaxy Watch FE R861XXU1BYJ1 is an Wear OS 6 firmware for 66 countries, 69 CSC codes. 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 R861XXS1BYH1: Android updated from Android 14 to Wear OS 6. A newer build for SM-R861 is available: R861XXS2CZG3.

8.7/10 (28)13,123 times
Wear OS 6
OS Version
2025-10-23
Build Date
2025-08-01
Security patch
66
Countries
69
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 Watch FE use bootloader binary 2 (latest: R861XXS2CZG3). 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: R861XXU1BYJ1
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-R861
    ACR, KSA Saudi Arabia
    AFR, DKR Kenya
    ARO Argentina
    ATO Austria
    +62 more countries
    AUT Switzerland
    BGL Bulgaria
    BNG Bangladesh
    BRI Taiwan
    BTU United Kingdom
    BVO Bolivia
    CAC Uzbekistan
    CAM Cambodia
    CHO Chile
    COO Colombia
    DBT Germany
    ECT Nigeria
    EGY Egypt
    EUR Greece
    ILO Israel
    INS India
    ITV Italy
    KOO South Korea
    LUX Luxembourg
    MID Iraq
    MWD Morocco
    MXO Mexico
    MYM Myanmar (Burma)
    NEE Nordic Europe
    NPL Nepal
    PAK Pakistan
    PEO Peru
    PHE Spain
    PHN Netherlands
    ROM Romania
    SEB Baltic Europe
    SEE Serbia
    SEK Ukraine
    SER Russia
    SIO Slovenia
    SKZ Kazakhstan
    SLK Sri Lanka
    TGY Hong Kong SAR China
    TPA Panama
    TPH Portugal
    TTT Trinidad & Tobago
    TUN Tunisia
    TUR Turkey
    UPO, UYO Uruguay
    XAA United States
    XAC Canada
    XEF France
    XEH Hungary
    XEO Poland
    XEZ Czechia
    XFA South Africa
    XJP Japan
    XME Malaysia
    XNZ New Zealand
    XSA Australia
    XSE Indonesia
    XSG United Arab Emirates
    XSK Slovakia
    XTC Philippines
    XXV Vietnam
    ZTO Brazil
    THO
    		R861OXM1BYJ1 2025-10-23 3.189 GiB
    SM-R861_2_20251023165751_fr9va7vuph_fac.zip

    No matching downloads

    Device specifications

    • Launched withWear OS
    • Display diagonal3.05 cm (1.2")
    • Display technologyAMOLED
    • Display resolution396 x 396 pixels
    • Processor frequency1180 MHz
    • RAM1500 MB
    • Flash memory16 GB
    • Battery capacity247 mAh
    • Weight26.6 g
    • Waterproof up to50 m
    • Band colourBlue

    What's new in R861XXU1BYJ1

    • 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 R861XXU1BYJ1

    • R861XXU1BYJ1 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

    R861XXU1BYJ1 is Wear OS 6 firmware for Samsung Galaxy Watch FE, released for 66 countries, 69 CSC codes. It includes the 2025-08-01 security patch. Samsung built it on 2025-10-23.

    No. A newer build for SM-R861 is available: R861XXS2CZG3. Install it instead of R861XXU1BYJ1 unless you need this exact version. The previous build was R861XXS1BYH1.

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

    This build uses bootloader binary 1. It can be flashed on a Samsung Galaxy Watch FE running binary 1 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 9 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 Watch FE

    • 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.

    • 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...

    Show 8 older builds

    • Stability and reliability
    Device behavior has been improved.

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

    No changelog details available.

    • Security
    The device is protected with improved security.

    • 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.

    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,...

    No changelog details available.
    Model firmware by region