Samsung Galaxy Watch3 41mm R855USQU1BUB2
SM-R855U 1 country Tizen 5.5.0.2

Samsung Galaxy Watch3 41mm R855USQU1BUB2 Firmware

Samsung Galaxy Watch3 41mm R855USQU1BUB2 is an Tizen 5.5.0.2 firmware for United States (XAR). 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 R855USQU1BTK2: Android updated from Tizen 5.5.0.1 to Tizen 5.5.0.2. A newer build for SM-R855U is available: R855USQU1DWK2.

9.1/10 (33)152 times
Tizen 5.5.0.2
OS Version
2021-03-19
Build Date
n/a
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.

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: R855USQU1BUB2
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-R855U
    XAR United States
    		R855UOYN1BUB2 2021-03-19 763.907 MiB
    SM-R855U_1_20210319154235_x707z5ywzh_fac.zip

    No matching downloads

    Device specifications

    • Launched withTizen
    • Display diagonal3.05 cm (1.2")
    • Display technologyOLED
    • Display resolution360 x 360 pixels
    • Processor frequency1.15 MHz
    • RAM1000 MB
    • Flash memory8 GB
    • Battery capacity340 mAh
    • Weight48.2 g
    • Band materialLeather
    • Band colourBronze

    What's new in R855USQU1BUB2

    • Improved Samsung Health Function
    - You can now enjoy a group-walking challenge with your friends
    - Reduced auto workout recognition time (running, rowing machine, elliptical)
    - Enjoy home workout with a variety of fitness programs
    • SmartThings Find
    - You can find the location of the watch on the map.
    • Hand Wash
    - After downloading the Hand Wash app, your watch can automatically detect and time, when you start washing your hands
    • Improved system stability and reliability

    How to flash R855USQU1BUB2

    • R855USQU1BUB2 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

    R855USQU1BUB2 is Tizen 5.5.0.2 firmware for Samsung Galaxy Watch3 41mm, released for United States (XAR). Samsung built it on 2021-03-19.

    No. A newer build for SM-R855U is available: R855USQU1DWK2. Install it instead of R855USQU1BUB2 unless you need this exact version. The previous build was R855USQU1BTK2.

    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 763.907 MiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Watch3 41mm must be on bootloader binary 1 or lower.

    This build uses bootloader binary 1. It can be flashed on a Samsung Galaxy Watch3 41mm 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 Watch3 41mm

    • Watch faces
    2 new types of new Watch faces.
    (Stretched Time, Perpetual)
    • Stability and reliability
    The stability for sensors has been improved.

    • Watch Face
    Enjoy new and improved watch faces with enriched style and customizable options.
    - Two new Watch Faces have been added.
      (Pro analog, Gradient number)
    • Samsung Health
    - Through the updated 'Daily Activity Indicator', Mobile Health data is synchronized to improve convenience.
    - Provides a recording function when snoring is detected, using your mobile phone while you sleep.

    • GPS
    The stability has been improved.

    • Watch faces
    - Support the new Watchfaces
    • Exercise
    - Support Group Challenge Widget in watch
    - Provide more accurate calorie consumption levels based on HR (Except swimming)
    • Detect falls
    - More falls will be detected, but other activity may also be detected as falls.
    • Calendar
    - Increase the calendar synchronization period from 3 months to 1 year

    • Improved WiFi stability
    Show 5 older builds

    • Improved Samsung Health Function
    - You can now enjoy a group-walking challenge with your friends
    - Reduced auto workout recognition time (running, rowing machine, elliptical)
    - Enjoy home workout with a variety of fitness programs
    • SmartThings Find
    - You can find the location of the watch on the map.
    • Hand Wash
    - After downloading the Hand Wash app, your watch can automatically detect and time, when you start washing your hands
    • Improved system stability and reliability

    • Voice guidance provided via headset connected to mobile when exercising with a watch.
    • Voice guidance provided for traveled distance and HR data, when Auto Lap feature is enabled during Running/Cycling.
    • Improved Blood Oxygen measurement
    • Improved system stability and reliability

    • Added the new Samsung Health Monitor App for ECG measurements.
    ※ Available on Galaxy smartphones with Android 7.0 and later

    No changelog details available.

    ※ After updating the Samsung Health App and check the new features below.
    - Blood Oxygen : Check how effectively your respiratory system transfers oxygen to the blood stream.
      * Not Available Countries : Algeria, Angola, Canada, France, Iran, Japan, Libya, South Africa, Thailand
    - Advanced Running Analysis : Giving you the insights you need to improve your running form.
    - VO2max : Check the maximum amount of oxygen you utilize during exercise to improve your endurance
    - Sleep score : Check ou...

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