SM-R905U 1 country Wear OS 6

Samsung Galaxy Watch5 R905USQU1CXK2 Firmware

Samsung Galaxy Watch5 R905USQU1CXK2 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 R905USQU1BXB7: Android updated from Wear OS 5 to Wear OS 6; security patch 2024-10-01 instead of 2024-03-01. A newer build for SM-R905U is available: R905USQS2DZG3.

9.0/10 (32)339 times
Wear OS 6
OS Version
2024-12-12
Build Date
2024-10-01
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: R905USQU1CXK2
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-R905U
    XAA United States
    R905UOYM1CXK2 2024-12-11 3.134 GiB
    SM-R905U_2_20241212144010_phxd9v47zb_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 R905USQU1CXK2

    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, styles, and complications.

    One UI visual enhancements
    Watch components such as buttons and toggles have been redesigned for greater consistency with One UI components on your Galaxy phone. You also get a new default font with a more stylish and modern feel. You’ll see the new font if the default font is selected in Settings. If you’re using a different font, you’ll still see that font after upgrading to One UI 6 Watch.

    Enhanced tile graphics
    The initial screen of each tile has been redesigned with stunning visuals and a more consistent feel.

    Unlock a healthier you

    Monitor your energy levels with Galaxy AI
    Samsung Health's new AI-powered energy score shows your physical and mental condition based on your sleep and physical activity. If your energy score is low, it may be best to take a rest. If your energy score is high, it could be time set a personal best in your favorite exercise. Galaxy AI provides personalized insights and motivation to keep you on the right track.

    Get more detailed sleep analysis
    New sleep insights give you more detailed and accurate analysis of your sleep quality. Your comprehensive sleep report now includes your heart rate, respiratory rate, and the amount of time it takes you to fall asleep after you lie down. Wear your watch at night to get the new sleep information.

    Make your own workout routines
    Combine a series of different exercises together for a custom workout routine. You can set targets for sets, reps, time, and more. After you start your routine, your watch can automatically switch to the next exercise when you meet your target. You can optionally add breaks in between exercises. When your routine is finished, you can view your results for the entire routine all in one place.

    Control your watch like a pro

    Do more with double pinch
    Take quick action without touching the screen by pinching your thumb and index finger together twice. You can answer calls, turn off alarms, scroll through notifications, control music, take pictures, and more with just one hand. When space is available, a finger icon will appear on buttons that can be controlled with a double pinch.

    Scroll through notifications and tiles quickly
    Quickly swipe the screen left or right from the watch face to scroll through multiple notifications or tiles at once. The speed of your swipe determines how many notifications or tiles you scroll through.

    View ongoing activities all at once
    Tap the bottom of your watch face to view a list of ongoing activities such as phone calls, exercises, or music playing. Tap an item in the list to easily switch between them.

    Convenient one-handed use with Universal gestures
    Universal gestures now makes it even easier to use your watch without touching the screen. A new gesture lets you easily go back to the previous screen, and when you have an incoming phone call or ringing alarm, you can use universal gestures immediately without any additional actions.

    Stay in touch from your wrist

    Smarter replies with AI
    Respond to messages quickly with AI-generated replies tailored to the message you received. Suggested replies will appear when you view a message notification. Replies are generated on your phone so your messages remain private. Works with phones running One UI 6.1.1 or higher that support AI Suggested replies.

    Reply quickly with your favorite emojis
    You can set the emojis you use most as favorites so they're always available to send as a quick response.

    Customize your watch

    Show weather info that’s important to you
    You can now edit your weather tile to show the weather information that you care about the most. Choose from a daily forecast, hourly forecast, precipitation, sunrise and sunset times, weather insights, and more.

    Show 2 world clocks at the same time
    Customize your world clock tile to show the times in 2 different cities at once so you can quickly check the time difference.

    Control notifications without opening your phone
    Choose which watch apps are allowed to send you notifications directly on your watch without opening the Galaxy Wearable app on your phone.

    Automate your watch with modes
    Modes you set up on your phone, such as Sleep mode, Exercise mode, or Theater mode, can now automatically control more of your watch's settings based on what you’re doing or where you are. In addition to Watch faces and Do not disturb, modes can now also control Always On Display, Raise wrist to wake, Touch screen to wake, Touch bezel to wake, Sound mode, and Disconnection alerts. Works with phones running One UI 6.1.1 or higher.

    Even more improvements

    Manage calendar events directly from your watch
    You can quickly add or edit events right from your wrist without the need to use your phone. Calendar weekly view has also been updated to show you how many events you have on each day.

    Make your battery last longer
    When Power saving is turned on, you can also choose to limit health features like workout auto detection and background heart rate measurements to make your battery last even longer than before.

    Automatically turn on your watch while charging
    Use your watch right away without the need to turn on the watch when charging is finished. To use this feature, Auto power on needs to be turned on in Settings.

    Automatically connect to Bluetooth audio devices
    When you start playing music on your watch, your Bluetooth headphones or speaker will automatically connect for playback if it's paired with your watch or phone. If no paired Bluetooth audio devices are available to connect, music will play through your watch’s speaker if your music app supports it.

    How to flash R905USQU1CXK2

    • R905USQU1CXK2 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

    R905USQU1CXK2 is Wear OS 6 firmware for Samsung Galaxy Watch5, released for United States (XAA). It includes the 2024-10-01 security patch. Samsung built it on 2024-12-12.

    No. A newer build for SM-R905U is available: R905USQS2DZG3. Install it instead of R905USQU1CXK2 unless you need this exact version. The previous build was R905USQU1BXB7.

    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 3.134 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.