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64GB

16GB

2GB

Ask Siri to set a reminder, send an invitation, or give you directions, all without your phone.

Yes

10
Subject to change based on future operating system updates

Powered by Samsung 4
Subject to change based on future operating system updates

Required to use smartwatch over cellular; rate plan required

Yes

802.11b/g/n

802.11a/b/g/n

2.4GHz and 5GHz

2.4GHz & 5.0GHz

Open, Secure

5.3

v5.3 + EDR, A2DP, HS, LE, aptX®

Yes

Electronic SIM

eSim

Bands 1, 2, 3, 4, 5, 7, 12, 13, 17, 18, 19, 25, 26, 39, 40, 41, 66

Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 18, 19, 20, 25, 26, 28, 40, 66, 71

850/1700/1900/2100MHz

850/900/1700/2100/1900/2100MHz

Yes

Generates an ECG similar to a single-lead electrocardiogram.

Set workout-specific goals, see full summaries when you're done, and track how you're trending over time.

Siren, Backtrack, Fall Detection,⁶Emergency SOS,⁷ and Crash Detection.

Keep tabs on your resting, walking, and workout recovery heart rate.

Improved Workout app with new metrics, new views, and advanced ways to train.

Ambient light, accelerometer, barometric altimeter, built-in GPS, gyroscope, third-generation optical heart rate, electrical heart rate (ECG app),⁸  temperature sensor⁹

Accelerometer, Ambient light, Barometer, Bioelectrical Impedance Analysis, ECG, Geomagnetic, Gyroscope, Heart rate, Infrared Temperature

Yes

Yes

Insert pictures, video clips and sound clips easily (messaging charges apply)

Microsoft Outlook

Apple Music®

Samsung Music

MP3, M4A, 3GA, AAC, OGG, OGA, WAV, AMR, AWB

Yes

The AT&T Eco-Rating 2.0 system gives you environmental and social details about this device. The system uses a total of 20 performance criteria across 5 different attributes, for a total rating of 1 to 5 stars: 19-20 (5-star), 16-18 (4-star), 13-15 (3-star), 10-12 (2-star), 8-9 (1-star)

4/4

2/3

1/1

2/2

10/10