Apple Watch Series 9 45mm vs Samsung Galaxy Watch4 Classic 42mm

64GB

Up to 16GB

1.5

9

Subject to change based on future operating system updates

Wear OS Powered by Samsung

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

Yes

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

Bands 2, 4, 5, and 12

850/1700/1900/2100MHz

850/1900MHz

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

5.3

v5.0 + EDR, A2DP, HS, LE

Electronic SIM

eSim

HSPA+ with enhanced backhaul

Yes

Open, Secure

Yes

Yes

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

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

Electrical heart sensor and ECG app

Third-generation optical heart sensor

High and low heart rate notifications

Sleep stages

Compass

Always-on altimeter

High-g accelerometer

Up to 256 g-forces with Fall Detection and Crash Detection

High dynamic range gyroscope

Ambient light sensor

Accelerometer, Ambient Light, Barometer, Gyroscope, Heart Rate,E-Compass, Magnetometer, ECG

Yes

Yes

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

Outlook

Yes

Apple Music®

Music

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

Up to 720p (30fps) (via 3rd party apps, no video player preloaded)

Via 3rd party apps, no video player preloaded

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

19/20 (5-star) Please visit www.att.com/ecospace for additional information