Samsung Galaxy Watch Ultra L705FXXU1BYFE

Samsung Galaxy Watch Ultra L705FXXU1BYFE Firmware

Samsung Galaxy Watch Ultra L705FXXU1BYFE is an Wear OS 6.0 firmware for 23 countries, 24 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 L705FXXU1AYE7 https://samfirm.shop/build/L705FXXU1AYE7: Android updated from Wear OS 6 to Wear OS 6.0; security patch 2025-05-01 instead of 2025-03-01. A newer build for SM-L705F is available: L705FXXS3BZF4 https://samfirm.shop/build/L705FXXS3BZF4.

Download firmware
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Wear OS 6.0
OS Version
2025-07-24
First release
other regions until 2025-07-30
2025-05-01
Security patch
23
Countries
24
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 Ultra use bootloader binary 3 (latest: L705FXXS3BZF4 https://samfirm.shop/build/L705FXXS3BZF4). If your device already runs binary 3, 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#.
    Your CSC is in Settings → About phone (About tablet) → Software information, or dial *#1234#. The CSC sets your region's features and network bands. Download the firmware for your country.
    6
    MODEM/CP Version: L705FXXU1BYFE
    ModelRegionCSC VersionBuild DateRelease dateSizeFile nameDownload
    SM-L705F
    ARO Argentina
    CHO Chile
    COO Colombia
    MXO Mexico
    L705FOWO1BYFE 2025-07-24 2025-07-24 3.564 GiB
    SM-L705F_1_20250724125700_adrosl4nnf_fac.zip
    Download
    SM-L705F
    ATO Austria
    AUT Switzerland
    BGL Bulgaria
    BTU United Kingdom
    +3 more countries
    DBT Germany
    TPH Portugal
    XEF France
    L705FOXA1BYFE 2025-07-24 2025-07-24 3.741 GiB
    SM-L705F_1_20250724125340_smx3xooh7d_fac.zip
    Download
    SM-L705F
    BRI Taiwan
    TGY Hong Kong SAR China
    THL Thailand
    XME Malaysia
    +3 more countries
    XNZ New Zealand
    XSA Australia
    XSP Singapore
    L705FOLB1BYFE 2025-07-24 2025-07-24 3.633 GiB
    SM-L705F_1_20250724125610_7ep93uatjt_fac.zip
    Download
    SM-L705F
    CAU Kazakhstan
    SLK Sri Lanka
    L705FOXX1BYFE 2025-07-24 2025-07-24 3.741 GiB
    SM-L705F_1_20250724125510_q822pa08y5_fac.zip
    Download
    SM-L705F
    DCM, KDI Japan
    SJP
    L705FSJP1BYFE 2025-07-30 — 3.614 GiB
    SM-L705F_1_20250730142351_4d3ltnm1n3_fac.zip
    Download
    SM-L705F
    XAC Canada
    L705FOYV1BYFE 2025-07-24 2025-07-24 3.6 GiB
    SM-L705F_1_20250724130050_h2nhsnw702_fac.zip
    Download

    No matching downloads

    How to flash L705FXXU1BYFE

    • L705FXXU1BYFE 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.

    What's new in L705FXXU1BYFE

    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 when you double pinch on the watch face, music controller, as well as alarm, calendar, and reminder alerts. Choose the actions you need most in each situation.

    Mark reminders as important
    Mark reminders as important by tapping the Star icon. You can choose to have important reminders pinned to the top of the list to make sure you notice them.

    Get reminders at specific places
    You can now set location-based reminders on your watch. For example, you can make your watch remind you to do the laundry when you arrive at home.

    New charging effects
    When your watch is charging, the new screen layout and animations make it easier to check the current battery level and remaining charging time.

    Stay connected

    Easily respond to notifications and alerts
    Use gestures to quickly respond to notifications and alerts. When a notification appears, you can double pinch to view the details or send a reply. You can also shake your wrist to return to the watch face.

    Enhanced notification view
    Notifications on your watch are now easier to use with an attractive new design. Notifications from the same app are stacked vertically, allowing you to view more notifications with fewer swipes.

    Smarter notification settings
    It's now easier to decide how to receive notifications from your phone on your watch. If you choose Smart device selection, notifications will appear on your phone only when you're using it and on your watch when you're not using your phone. If you choose Always show on both, notifications will always appear on both your phone and watch.

    Upgrade your health

    Running coach
    Whether you're a beginner or an experienced runner, the new Running coach feature in Samsung Health provides personalized training programs and tips to help you run farther and faster while minimizing the risk of injury.

    Bedtime guidance
    Get to sleep at the right time so you wake up feeling refreshed. The new Bedtime guidance feature analyzes your sleep data and recommends the best time to go to sleep each night.

    Mindfulness
    Manage stress and anxiety in your daily life with the new Mindfulness feature in Samsung Health. You can keep track of your moods and emotions and practice breathing exercises to reduce stress.

    Track your vascular load
    Use your Galaxy Watch to measure your vascular load, which is the amount of stress on your blood vessels. First, take a baseline measurement, then you'll be able to see when your vascular load gets higher or lower over time.

    Check your antioxidant intake
    The Antioxidant index (Labs) feature on your watch detects the level of carotenoids in your skin. Carotenoids are a type of antioxidant contained in fruits and vegetables that can help prevent physical aging.

    Tailored to you

    Find the perfect watch face
    It's now easier to find the watch face that's right for you. Just choose a few keywords such as your preferred style, color, and information to show. The best matches will be suggested from our collection of more than 300 watch faces.

    Recommended watch faces
    Discover new watch faces that you might like. Watch faces with colors, style, or information similar to your current watch face will be recommended on the watch face selection screen.

    Create your own tiles
    Create your own custom tiles that show the information you need. You can even combine information from different apps into a single tile. You can include weather information, calendar events, reminders, and more.

    Personalized Apps screen
    Featured apps now appear at the top of your Apps screen to give you quick access to the apps you need the most. Apps will be featured based on how often you use them and other usage patterns. You can also view your apps as a list with names instead of only icons.

    Choose calendars to show on your watch
    You can now choose which calendars to show in the Calendar app on your watch. You can show all of the same calendars that are on your phone or customize to show only the calendars you need.

    Security patch: May 2025

    SMR May-2025 fixes 75 vulnerabilities, 0 of them critical. Android Security Bulletin: 59, Samsung Semiconductor: 3, Samsung-specific issues (SVE): 13.

    Most severe Samsung fixes:

    • high Out-of-bounds write in Keymaster trustlet (CVE-2025-20937)
    • high Improper access control in SmartManagerCN (CVE-2025-20957)
    • high Out-of-bounds write in libsavsvc.so (CVE-2025-20963)

    All fixes and Galaxy models with this patch

    Rollout of L705FXXU1BYFE by region

    Samsung released this build in all regions (21) on the same day, July 24, 2025.

    Device specifications

    • Launched withWear OS
    • Display diagonal3.81 cm (1.5")
    • Display technologyAMOLED
    • Display resolution480 x 480 pixels
    • Processor frequency1600 MHz
    • RAM2000 MB
    • Flash memory64 GB
    • Battery capacity590 mAh
    • Weight60.5 g
    • Band materialTitanium
    • Band colourBlue
    • Band sizeOne Size

    Frequently Asked Questions

    L705FXXU1BYFE is Wear OS 6.0 firmware for Samsung Galaxy Watch Ultra, released for 23 countries, 24 CSC codes. It includes the 2025-05-01 security patch. Samsung built it on 2025-07-24.

    SMR May-2025 fixes 75 vulnerabilities, 0 of them critical. Android Security Bulletin: 59, Samsung Semiconductor: 3, Samsung-specific issues (SVE): 13.

    No. A newer build for SM-L705F is available: L705FXXS3BZF4. Install it instead of L705FXXU1BYFE unless you need this exact version. The previous build was L705FXXU1AYE7.

    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 Samsung Galaxy Watch Ultra must be on bootloader binary 1 or lower.

    This build uses bootloader binary 1. It can be flashed on a Samsung Galaxy Watch Ultra 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 Ultra

    https://samfirm.shop/build/L705FXXS3BZF4

    • Security
    The device is protected with improved security.

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

    No changelog details available.
    https://samfirm.shop/build/L705FXXU3BZB4

    • 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.

    No changelog details available.

    • 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.

    Show 8 older builds
    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...

    • The usability of device operations has been improved.

    • 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.
    • Google Security patch
    The device is protected with improved security.

    • Stability and reliability
    The stability has been improved.

    • Stability and reliability
    - Battery charging stability has been improved.
    - Battery stability has been improved.
    - Overall device stability has been improved.

    No changelog details available.