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Required to use smartwatch over cellular; rate plan required

Yes

802.11b/g/n

802.11n

2.4GHz and 5GHz

2.4GHz

Open, Secure

5.3

v5.2 + EDR, A2DP, HS, LE

Yes

Electronic SIM

eSim

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

Bands 2, 4, 5, 12, 13, 17, 25, 26, 66, 71

850/1700/1900/2100MHz

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, cEDA, Gyroscope, Heart Rate, Magnetometer, Skin Temp, SpO2

Yes

Yes

Send and receive text messages from your wrist (messaging charges apply).

Apple Music®

YouTube Music

FLAC, M4A, MP3, OGG, WMA

Via lockscreen

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)

3/4

3/3

1/1

2/2

7/10