Galaxy Watch3 Cellular (45mm)

SM-R845FZSAXSA
Galaxy Watch3 Cellular (45mm) is rated 4.3 out of 5 by 6.
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COLOUR Mystic SilverMystic Silver

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The only smartwatch with precision rotating bezel for app navigation

CLASSIC

Bigger display, Yet lighter and slimmer for comfort wear

DIGNIFIED DESIGN

NFC

NFC

Bluetooth v5.0

Bluetooth Version

The most advanced health monitor on a Samsung smartwatch

The watch that watches out for you. Galaxy Watch3 combines smartphone-level productivity and leading health technology in one classic device. Our most advanced Galaxy watch yet, Galaxy Watch3 helps you effortlessly manage your life and health — putting your well-being in your hands.1, 2, 3, 4

As the 45mm Galaxy Watch3 in Mystic Black rotates, it turns into a 45mm Galaxy Watch3 in Mystic Silver with an Analog Modular watch face. It continues rotating and turns into the 41mm in Mystic Bronze with the Female Classic watch face. Once it stops, multiple Galaxy Watch3’s with different watch faces appear to show all the different combinations.

CLASSIC

The only Samsung smartwatch with precision rotating bezel for app navigation

Take your pick of two sizes, 45mm or 41mm, each with a face you won't soon forget. Available in premium Mystic Black, Mystic Silver, and Mystic Bronze hues, the elegant design is outlined in a unique rotating bezel for a look that works around the clock.5

45mm Galaxy Watch3 in Mystic Black with a Sporty Classic Watch Face seen from an angle
45mm Galaxy Watch3 in Mystic Silver with an Analog Modular Watch Face seen from an angle
41mm Galaxy Watch3 in Mystic Bronze with a Female Classic Watch Face seen from an angle
41mm Galaxy Watch3 in Mystic Silver with an Analog Modular Watch Face seen from an angle

DIGNIFIED DESIGN

Bigger display, with a lighter and slimmer design

Outlined in a subtle rotating bezel, it's easier to see and focus on what matters with an even bigger screen. Galaxy Watch3 is thinner and smaller, yet about 15% lighter with a sophisticated look that's ideal for your wrist with its slimmed down frame.6

Man stretches his arms behind his back, showing off a 45mm Galaxy Watch3 in Mystic Black on his wrist with a Sporty Classic Watch Face.

LEATHER STRAP

Amazing quality, down to the strap

Galaxy Watch3 features a premium genuine aged leather strap to create a classic look, while the inside of the strap is designed to protect against discolouration.

An underside view of the 41mm Galaxy Watch3 in Mystic Bronze and 45mm Galaxy Watch3 in Mystic black, highlighting the premium leather strap.

WATCH FACE

Beauty with smarts to match

Complete Galaxy Watch3's signature look with over 40 watch face combinations to choose from, all matching its sleek body. See useful information at a glance, whilst easily accessing your favourite apps.

Front view of 45mm Galaxy Watch3 in Mystic Black surrounded by various watch faces, including Analog Modular, Digital Modular, Pattern Classic Watch Faces and weather, My Style, and Off center classic GUIs.

Take your health into your own hands, with your wrist

BLOOD OXYGEN

Breathe easier with built-in oxygen measurement

Galaxy Watch3 uses red LED and infrared rays to estimate your SpO2 levels, or the amount of oxygen in your bloodstream. Because this oxygen saturation is directly linked to physical performance, you can use Galaxy Watch3 to push your routine to the next level.7

Angled view of a 45mm Galaxy Watch3 in Mystic Black with Blood Oxygen measurement GUI.

Side view of a 45mm Galaxy Watch3 in Mystic Black with fall detection GUI.

Front view of a 45mm Galaxy Watch3 in Mystic Black with sleep score measurement GUI.

Angled view of a 45mm Galaxy Watch3 in Mystic Black with Blood Oxygen measurement GUI.

FALL DETECTION

Fall detection that won't fall down on the job

Explore fearlessly. Galaxy Watch3 is designed to automatically detect hard falls with its enhanced accelerometer, sending an SOS to your emergency contact with your location.8, 9, 10, 11, 12

Angled view of a 45mm Galaxy Watch3 in Mystic Black with Blood Oxygen measurement GUI.

Side view of a 45mm Galaxy Watch3 in Mystic Black with fall detection GUI.

Front view of a 45mm Galaxy Watch3 in Mystic Black with sleep score measurement GUI.

SLEEP SCORE

Get a better night's sleep

Galaxy Watch3 records your REM cycles, deep sleep, and total sleep time to score and help improve the quality of your rest.13

Front view of a 45mm Galaxy Watch3 in Mystic Black with sleep score measurement GUI.

HOME WORKOUT

Hit your best, then do it again

Equipped with over 120 home workout programs to choose from Samsung Health, Galaxy Watch3 helps you get your body moving on your time. Pick from your phone and cast to your TV – as you work out, it'll display your heart rate in real time.14, 15, 16, 17, 18

Woman in plank position, following a home workout program that is cast from a Galaxy smartphone onto the TV. The 45mm Galaxy Watch3 in Mystic Black is connected to measure her heart rate.

RUNNING ANALYSIS

Improve every stride

Galaxy Watch3's running guide lets you keep pace as you get tips on the go. The advanced algorithm analyses how you move to help improve your form. You can even measure VO2 max values and keep up with your daily, weekly, and monthly performance right from your phone.19, 20

Front view of 45mm Galaxy Watch3 in Mystic Black with Running Analysis GUI. It’s next to a Galaxy smartphone showing levels of running asymmetry.

AUTO CHAT HISTORY

Keep the conversation going

When you get a new text, Galaxy Watch3 shows your chat history so you can effortlessly follow the conversation. You can also see images without an extra tap, making it even easier to keep the mood going while on a run.19, 20

Messages show the sending and receiving messages. A selfie is received, zooming out to show the 45mm Galaxy Watch3 in Mystic Black with Smart Reply GUI.

SMART REPLY

Add a little context with smart reply

Stay connected with others even on the go – and without fumbling to reply. Galaxy Watch3's smart reply analyses texts and photos you receive and gives you suggested replies, supporting different categories that include food, celebrations, selfies, and more.21, 22

45mm Galaxy Watch3 in Mystic Black with Smart Reply GUI.

BITMOJI

More fun in your messages

Bitmoji stickers open up fun new ways to communicate. Personalise your Bitmoji to look just like you and use Bitmoji stickers to jazz up the way you talk to family and friends.21, 22, 23, 24, 25

Angled view of 45mm Galaxy Watch3 in Mystic Black and 41mm Galaxy Watch3 in Mystic Bronze. The two show the sending and receiving of Bitmoji emojis through the Message app.

MUSIC

The beat goes on and on

Your music doesn't stop as you go from one device to another. Play Spotify on your Galaxy Note20, then open it with the Spotify app icon on your watch face to easily switch songs from your Galaxy Watch3. Or you can even touch and hold Galaxy Buds Live to get lost in the music.26, 27, 28, 29, 30

spotify
Front view of 45mm Galaxy Watch3 in Mystic Black next to a Galaxy smartphone and Galaxy Buds Live. The watch and smartphone display the same Spotify GUI, showing how you can play music on Galaxy Buds Live and seamlessly control it through Galaxy Watch3.

WATCH APPS

Team up with other apps

Put together a team of Galaxy Apps to join you and your phone in your day-to-day. Find your phone and see your phone's photos from your watch, or switch between devices to control your music and check reminders. The perfect partners are all on your wrist.31

LTE

Leave your phone at home

Go out for new experiences without the weight of your phone. You can still call, stream, and check your steps — all from your watch. Disconnect from your phone, while staying connected with life.32

Front view of 45mm Galaxy Watch3 in Mystic Black with LTE function GUIs to show how you can call, message right from your watch.

A powerful experience enhanced with Galaxy favourites

WHAT'S IN THE BOX

Ready for action right out of the box

A flat lay of the items included in box with Galaxy Watch3. The packaging, device, and charger with charging dock.

GALAXY ECO SYSTEM

More ways to power up your work and play

Simply connect Galaxy Watch3 to your compatible Galaxy devices through your Samsung Cloud account. As you go to work or workout, it's quick and easy to go from watch to Galaxy Note20, or from watch to Galaxy Buds Live via Bluetooth.33

Front view of Galaxy Watch3 next to Galaxy Buds Live and rear view of Galaxy Note20.

COMPATIBILITY

Gets along with other devices

Galaxy Watch3 is compatible and can easily connect with a range of Galaxy and non-Galaxy devices.34, 35, 36, 37

A line drawing showing a front-facing Galaxy Watch3 next to a smartphone, demonstrating its compatibility with different devices.
  1. Availability of colours, sizes, and models may vary by country or region.
  2. Available strap models may vary country.
  3. Image simulated for illustrative purposes.
  4. UI is subject to change.
  5. Availability of colours and sizes may vary by country or region.
  6. Figures compare the Galaxy Watch3 45mm Stainless Steel and Galaxy Watch 46mm Stainless Steel models. There may be differences in measurements based on the position measured.
  7. Galaxy Watch3 is not a medical/therapeutic device and is not intended for medical use. It is solely intended for fitness and wellness purposes only and is not intended for use in the diagnosis of disease or other conditions; or in the cure, mitigation, treatment or prevention of disease; or for the prevention or control of pregnancy. Samsung recommends that you consult with your doctor before participating in any exercise program. Using Samsung Health app with Galaxy Watch3 requires signup and pairing with your compatible smartphone. Fall Detection must be switched on and your Location must be enabled to share with your Emergency contact.
  8. Galaxy Watch3 can initiate Emergency call and message when initiated after detecting a fall.
  9. Galaxy Watch3 cannot detect all falls.
  10. Intense physical activity can trigger Fall Detection feature.
  11. Sending SOS calls and messages requires network connection and smartphone pairing.
  12. Galaxy Watch3 is not a medical/therapeutic device. Fitness and health functions (including SleepScore and Fall Detection) are for informational purposes only. Using Samsung Health app with Galaxy Watch3 requires signup and pairing with your compatible smartphone. Fall Detection must be switched on and your location must be enabled to share with your pre-selected contact.
  13. Sleep management functions (REM cycles, deep sleep, and total sleep time) on the watch can be used as standalone, but smartphone pairing is recommended in order to see sleep score. Insight only available on paired smartphone.
  14. Galaxy Watch3 is not a medical/therapeutic device. Fitness and health functions (including SleepScore and Fall Detection) are for informational purposes only. Using Samsung Health app with Galaxy Watch3 requires signup and pairing with your compatible smartphone. Fall Detection must be switched on and your location must be enabled to share with your pre-selected contact.
  15. Fitness tracking on the watch can be used as standalone, but data stored in the watch may only be partially displayed after a certain period of time. Smartphone pairing is recommended in order to keep all data stored.
  16. Feature requires Samsung SmartThings app and Bluetooth connection.
  17. Smartphone, TV, and Ridge Sport Band sold separately. Availability may vary by country or region.
  18. Workout program availability may differ by country or region.
  19. Detailed chart only available on paired smartphone.
  20. Galaxy Watch3 is not a medical/therapeutic device. Fitness and health functions (including SleepScore and Fall Detection) are for informational purposes only. Using Samsung Health app with Galaxy Watch3 requires signup and pairing with your compatible smartphone. Fall Detection must be switched on and your location must be enabled to share with your pre-selected contact.
  21. Bitmoji is a trademark of Snap Inc.
  22. Sending Bitmoji stickers requires Bitmoji app version 10.84 or later.
  23. Bitmoji feature is only supported on the Message app.
  24. Service availability may vary by country or region.
  25. Wi-Fi/LTE connection is required on Galaxy Watch3 and feature requires pairing with smartphone.
  26. Must be logged into Spotify. Subscription required.
  27. Availability of Spotify service may vary by country.
  28. Spotify is only supported on devices running version 8.5.56 and later. Requires configuring touchpad settings through the Galaxy Wearables app.
  29. Galaxy Note20 and Galaxy Buds Live sold separately. Availability of Galaxy Note20 and Galaxy Buds Live may vary by country or region.
  30. Wi-fi or mobile data connection required. Fees may apply.
  31. Compatible apps may vary by carrier or country.
  32. Cellular feature only available on Cellular models. Availability of Cellular model may vary by carrier or country.
  33. Galaxy Note20 and Galaxy Buds Live sold separately. Availability of Galaxy Note20 and Galaxy Buds Live may vary by country or region.
  34. Compatible with Android 5.0 (L OS) or higher, RAM 1.5GB above.
  35. Compatible with iPhone 5 and above, iOS 9.0 or above.
  36. Compatible smartphones and available features may vary by region, carrier and device.
  37. Activation feature for Mobile Network of Galaxy Watch3 with non-Samsung smartphones may not be available in some countries.