Buying GuidesGalaxy Watch LTE vs Bluetooth: Do You Need It?
Choose a Galaxy Watch connection: when LTE helps, what Wi-Fi can do, carrier checks, phone requirements, and how to compare the full cost.
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Samsung · Watches
Galaxy Watch9
Samsung's everyday 2026 Wear OS watch in 40 mm and 44 mm, with sapphire crystal, a 3,000-nit display, dual-frequency GPS, and 5ATM plus IP68.
Released · First official release in any country
Global release: Released internationally; available in confirmed markets.
Samsung confirms Galaxy Watch9 and Galaxy Watch Ultra2 availability in 106 markets worldwide beginning August 7, 2026. Local sizes, connectivity options, and sales channels vary. Samsung confirms Galaxy Z series and Galaxy Watch availability in 106 markets Checked .
- Operating system
- Wear OS 7 (Wear OS Powered by Samsung, One UI 9 Watch)
- Case size
- 44 mm / 40 mm
- Connectivity
- Varies by model
- Listed battery duration
- Not confirmed
- Options
- Models
- 6 model numbers across 3 regions See all
- Colors
- Graphite, Silver, Cream
Is the Galaxy Watch9 right for you?
The Galaxy Watch9 is Samsung's everyday smartwatch for Android phone owners. It comes in two aluminum sizes, 40 mm and 44 mm, weighing 31.5 g and 34.0 g, both with sapphire crystal and a display rated up to 3,000 nits.
It shares its processor, sensor set, and Wear OS 7 software with the Galaxy Watch Ultra2, including dual-frequency GPS. The differences include resistance ratings, size, and battery capacity: 5ATM and IP68 instead of the Ultra2's dive certification, and 390 or 445 mAh batteries instead of 800 mAh. Samsung does not publish battery-life hours for either watch.
It only works with Android. Activation needs a phone with Google Mobile Services, so it cannot be set up with an iPhone, and some health features need a Samsung Galaxy phone.
A good fit if
- You want a light watch you can wear all day and to bed.
- You want the shared processor and sensor set in a lighter case, without the Ultra2's dive certification.
- You have smaller wrists and want the 40 mm size.
Look elsewhere if
- You need documented dive certification: the Galaxy Watch Ultra2 lists EN13319 and IP69K. Check Samsung's operating limits and app availability before choosing it for a specific activity.
- You use an iPhone.
- Battery life is your top priority and you need a published runtime figure.
Which configuration to choose
Pick the size first: 40 mm for smaller wrists and the lowest weight, 44 mm for a larger screen and the bigger 445 mAh battery. The Bluetooth model relies on your phone for data; the 44 mm LTE model can take calls and messages away from it. The sources used for this record do not list a 40 mm LTE model, so if you want LTE, the 44 mm is the confirmed option.
Full specifications
Covers every recorded configuration. When a value varies by configuration, the model numbers it applies to are listed under it.
Software
- Operating system
- Wear OS 7 (Wear OS Powered by Samsung, One UI 9 Watch)
Design
- Case size
- 44 mmSM-L350, SM-L355F, SM-L355U
- 40 mmSM-L340, SM-L345F, SM-L345U
Connectivity
- Connectivity
- Bluetooth 6.0, Wi-Fi 2.4 GHz + 5 GHz, NFC, dual-frequency GPS (L1 + L5)SM-L350, SM-L340
- LTE, Bluetooth 6.0, Wi-Fi 2.4 GHz + 5 GHz, NFC, dual-frequency GPS (L1 + L5)SM-L355F, SM-L355U, SM-L345F, SM-L345U
Sensors
- Sensors
- Samsung BioActive Sensor (optical bio-signal, electrical heart signal, bioelectrical impedance), Temperature, Accelerometer, Barometer, Gyroscope, Geomagnetic, Light
Battery
- Listed battery duration
- Not confirmed
- Battery mode
- Samsung lists capacity only: 445 mAh (44 mm) and 390 mAh (40 mm). No battery-life figure in the specification table.
Durability
- Water resistance
- 5ATM, IP68, MIL-STD-810H
Configuration
- Memory
- 2 GB
- Storage
- 32 GB
Compatibility
- Works with iPhone
- Not supported
- Phone requirements
- Works with Android 13 or higher phones with more than 1.5 GB of memory. Activation requires a phone that supports Google Mobile Services, so it cannot be set up with an iPhone. Some health features need a Galaxy phone.
Configurations & colors
- Graphite
- Silver44 mm only
- Cream40 mm only
Match the regional model numbers to the confirmed markets below. These countries are verified by official sources; configurations and local stock can differ.
| Region and model | Configuration | Confirmed markets | Colors |
|---|---|---|---|
| All listed marketsSM-L350 | 44 mm, Bluetooth | United States, Canada, United Kingdom, Germany, France, Singapore, Australia | Graphite, Silver |
| InternationalSM-L355F | 44 mm, LTE | Canada, United Kingdom, Germany, France, Singapore, Australia | Graphite, Silver |
| United StatesSM-L355U | 44 mm, LTE | United States | Graphite, Silver |
| All listed marketsSM-L340 | 40 mm, Bluetooth | United States, Canada, United Kingdom, Germany, France, Singapore, Australia | Graphite, Cream |
| InternationalSM-L345F | 40 mm, LTE | Canada, United Kingdom, Germany, France, Singapore, Australia | Graphite, Cream |
| United StatesSM-L345U | 40 mm, LTE | United States | Graphite, Cream |
Software & compatibility
Operating system: Wear OS 7 (Wear OS Powered by Samsung, One UI 9 Watch).
Works with Android 13 or higher phones with more than 1.5 GB of memory. Activation requires a phone that supports Google Mobile Services, so it cannot be set up with an iPhone. Some health features need a Galaxy phone.
Works with iPhone: Not supported.
Source-backed strengths and limitations
Strengths
- Sapphire crystal and a display rated up to 3,000 nits on both sizes.
- Two sizes (40 mm and 44 mm) at 31.5 g and 34.0 g, per Samsung.
- Dual-frequency GPS and Wi-Fi on 2.4 GHz and 5 GHz.
Limitations
- Android only: it cannot be activated with an iPhone.
- Samsung does not publish a battery-life figure in the specification table.
- The 40 mm LTE model is not listed in the sources used for this record.
Pricing
$379.99 · United States · launch price · Checked 2026-09-20 · Source
Sources & verification
Spotted a wrong value? Send us the official source.Report a correction
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