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Yes

Required to use smartwatch over cellular; rate plan required

802.11n

802.11b/g/n

2.4GHz

2.4GHz and 5GHz

Open, Secure

v5.2 + EDR, A2DP, HS, LE

5.3

Yes

eSim

Electronic SIM

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

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

850/1700/1900/2100MHz

Yes

Accelerometer, Ambient Light, Barometer, cEDA, Gyroscope, Heart Rate, Magnetometer, Skin Temp, SpO2

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

Yes

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

Yes

YouTube Music

Apple 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

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.