Samsung Galaxy Watch4 R875USQU1BUI5
SM-R875U 1 country Wear OS 11

Samsung Galaxy Watch4 R875USQU1BUI5 Firmware

Samsung Galaxy Watch4 R875USQU1BUI5 is an Wear OS 11 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 R875USQU1BUH9, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. A newer build for SM-R875U is available: R875USQS2JZG3.

9.4/10 (34)189 times
Wear OS 11
OS Version
2021-10-06
Build Date
2021-08-01
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 Watch4 use bootloader binary 2 (latest: R875USQS2JZG3). 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: R875USQU1BUI5
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-R875U
    XAA United States
    		R875UOYM1BUI5 2021-10-06 2.199 GiB
    SM-R875U_1_20211006120151_ec0lb4raty_fac.zip

    No matching downloads

    Device specifications

    • Launched withWear OS
    • Display diagonal3.56 cm (1.4")
    • Display technologyOLED
    • Display resolution450 x 450 pixels
    • RAM1500 MB
    • Flash memory16 GB
    • Battery capacity361 mAh
    • Weight30.3 g
    • Band colourSilver

    Specifications of SM-R875F, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    What's new in R875USQU1BUI5

    • Improved usability of the following applications or features: Touch bezel
    • Improved system stability and reliability

    How to flash R875USQU1BUI5

    • R875USQU1BUI5 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

    R875USQU1BUI5 is Wear OS 11 firmware for Samsung Galaxy Watch4, released for United States (XAA). It includes the 2021-08-01 security patch. Samsung built it on 2021-10-06.

    No. A newer build for SM-R875U is available: R875USQS2JZG3. Install it instead of R875USQU1BUI5 unless you need this exact version. The previous build was R875USQU1BUH9.

    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 2.199 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Watch4 must be on bootloader binary 1 or lower.

    This build uses bootloader binary 1. It can be flashed on a Samsung Galaxy Watch4 running binary 1 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 18 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 Watch4

    • 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 15 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.

    One UI 5 Watch Upgrade

    Watch faces and tiles

    • Add watch faces and tiles more easily
    A new vertical layout makes it easier to find the watch faces and tiles that are right for you.

    • Check the battery level of all your devices
    The new Battery tile lets you quickly check the battery level of your watch, phone, and Galaxy Buds.

    • Improved Buds controller tile
    You can now turn 360 audio on and off from the Buds controller tile if your Buds support 360 audio.

    • Quick access to timers
    You can st...

    • Samsung Health
    The application will be updated to the latest version.
    • Improved system stability and reliability
    The stability has been improved.

    • Stability and reliability
    The stability has been improved.

    • New Camera Controller feature added
    Change zoom on your phone camera remotely through pinching in or out on the screen, or through rotating the bezel.
    ※ This feature is only supported on flagship models released after Samsung Galaxy S20 or Z Flip running at least One UI 5.1.
    • Samsung Members
    A new “Connected device diagnostics” option has been added to check the proper performance of the Galaxy Watch's battery status, touch screen function, etc. on the connected phone.
    ※ Please update Samsung...

    • Watch Face
    Newly designed Ball Watch face is added.
    • Stability and reliability
    Stability codes applied to improve notifications and device behavior.

    • Watch Face
    Enjoy new and improved watch faces with enriched style and customizable options.
    - 6 new watch faces
      (Pebbles, Flower garden, Info Board, Pro analog, Kinetic digits, Gradient number)
    - More customizable options added for existing watch faces
      (Dial, Indexes, Character, Color, Complication, Clock type)
    - New complications have been added.
    • Watch home screen
    - Add watch faces as your favorite, make finding and changing watch face easier.
    - Explore watch face list to add wat...

    • Improved system stability and reliability
    Stabilization codes for watch operation have been applied.

    • Enhanced Samsung Health Function
    • Improved system stability and reliability

    • Live Wallpaper Watch face update with Galaxy S22's Wallpaper.
    • New Watch faces have been added to match the new bands.
    • More customization options, such as colors and clock fonts, have been added to existing Watch faces.
    • Provides information on moisture loss and intake required after outdoor running exercises for body balance and exercise efficiency.
    • Supports Interval Training for Running and Cycling Exercises. Make a more systematic exercise plan with Galaxy Watch!
    • When you're done ex...

    • Watch faces
    - Supports 4 types of new Watch faces.
    - Together, AR Emoji, Bitmoji Watch face: Usability was improved.
    - My Photo Watch face: Supports GIF files.
    - Animal, Cute Character Watch face: Customization feature was improved.
    - Supports the backup and restoration of the order of Watch faces and the changed settings of the preloaded Watch faces.
    • Samsung Health
    - An improved HR measurement accuracy algorithm was added.
    - The sensitivity option in the Fall Detection feature was ad...

    Model firmware by region