Samsung Galaxy Watch Ultra (2025) vs Samsung Galaxy Watch4 Classic 42mm

32GB | 64GB

Up to 16GB

2GB

1.5

Powered by Samsung 5.0

Subject to change based on future operating system updates

Wear OS Powered by Samsung

Yes

Yes

Bands 2, 4, 5, 12, 13, 14, 25, 26, 66, 71

Bands 2, 4, 5, and 12

850/900/1700/1900/2100MHz

850/1900MHz

Yes

Yes

Yes

Yes

Wi-Fi 4 (802.11n)

802.11a/b/g/n

2.4GHz & 5GHz

2.4GHz & 5.0GHz

Open, Secure

Open, Secure

v5.3 + EDR, A2DP, HS, LE, aptX®

v5.0 + EDR, A2DP, HS, LE

eSim

eSim

Yes

Yes

HSPA+ with enhanced backhaul

Yes

Yes

Accelerometer, Ambient light, Barometer, Gyroscope, Heart rate, Temperature

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

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

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

Microsoft Outook

Outlook

Yes

Music

Music

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

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

Yes

Yes

This device is not hearing aid compatible.

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)

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

4/4

2/3

2/3

1/1

1/1

2/2

2/2

10/10

10/10

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

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

Via 3rd party apps, no video player preloaded