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64GB

32GB

11

Subject to change based on future operating system updates

9

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

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

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, 12, 13, 17, 18, 19, 25, 26, 39, 40, 41, 66

850/1700/1900/2100MHz

850/1700/1900/2100MHz

Required to use smartwatch over cellular; rate plan required

Required to use smartwatch over cellular; rate plan required

Wi-Fi 4 (802.11n)

802.11b/g/n

2.4GHz and 5GHz

2.4GHz and 5GHz

5.3

v5.0

Electronic SIM

Electronic SIM

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

Track a casual walk, an intense ride, and everything in between.

Track your daily activity on Apple Watch, and see your trends in the Fitness app on iPhone.

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

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

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

Electrical heart sensor

Third-generation optical heart sensor

Compass

Always-on altimeter

High-g accelerometer

High dynamic range gyroscope

Ambient light sensor

Depth gauge

Water temperature sensor

Ambient light, accelerometer, barometric altimeter, built-in GPS, gyroscope, third-generation optical heart rate

Yes

Yes

Apple Music®

Apple Music®