Xiaomi 15 vs Samsung Galaxy Watch Ultra (2025) Specs Comparison

Availability

Expected nnouncement
	Jul 09, 2025
Prices (MSRP)
12GB/256GB - €999

Design

Dimensions
6.00 x 2.80 x 0.32 inches 152.3 x 71.2 x 8.08 mm
Weight
6.67 oz / 189.0 g	2.13 oz / 60.5 g
Materials
Back: Glass	Back: Glass (Sapphire), Ceramic Frame: Titanium
Resistance
Yes; IP68	Water (up to 10 meters), Dust; IP68; MIL-STD-810 certified
Biometrics
Ultrasonic in-screen fingerprint
Keys
Right: Volume control, Lock/Unlock key
Colors
	Titanium Silver, Titanium Gray, Titanium White

Display

Size
6.4-inch, 90.03% screen-to-body	1.5-inch
Type
OLED, 120Hz, HDR, 3200 nits	Super AMOLED
Resolution
2670x1200px, 20:9 ratio, 460 PPI	480x480px, 453 PPI
Protection
	Sapphire
Features
HDR support, Dolby Vision

PhoneArena Display Test

Bright Max (20% APL)
3175 (Excellent)	Untested
Bright Min
1.9 (Good)	Untested

Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
Snapdragon 8 Elite SM8750-AB (3 nm)	Exynos W1000 (3 nm)
Processor
Octa-core 2x4.32GHz Prime cores 6x3.53GHz Performance core
GPU
Adreno 830	Mali-G68
Memory
12GB/256GB (UFS 4.0) 12GB/512GB 16GB/512GB 16GB/1024GB	2GB/32GB
Storage expansion
not expandable
OS
Android (14)	Wear OS

PhoneArena Performance Test

GeekBench 6 Single
3053	Untested
GeekBench 6 Multi
9261	Untested
3D Mark High
6220	Untested
3D Mark Low
4475	Untested

Learn more on our PhoneArena Performance Test Results page.

Battery

Type
5240 mAh	590 mAh
Charging
Fast charging Qi wireless charging, Reverse wireless charging	Qi wireless charging
Charge speed
Wired: 90.0W Wireless: 50.0W	Wireless: 10.0W

PhoneArena Battery Tests

Battery Life Estimate

7h 18min

Browsing

17h 6min

Video

9h 49min

Gaming

11h 38min

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Triple camera
Main camera
50 MP (OIS, Laser and PDAF) Aperture size: F1.6 Focal length: 23 mm
Second camera
50 MP (Telephoto, Periscope, OIS) Optical zoom: Yes Aperture size: F2.2
Third camera
50 MP (Telephoto, Periscope, OIS) Optical zoom: Yes Aperture size: F2.0 Focal Length: 60 mm
Flash
Dual LED
Video recording
8K UHD (30 fps), 4K UHD (60 fps), 1080p (960 fps)
Front
32 MP Video capture: 4K UHD (60 fps)

PhoneArena Camera Tests

146

Overall

153

Photo

138

Video

N/A

Overall

N/A

Photo

N/A

Video

Learn more on our PhoneArena Camera Test Results page

Connectivity & Features

Bluetooth
5.4	5.3
WLAN
a,b,g,n,ac,Wi-Fi 6,Wi-Fi 6E,Wi-Fi 7 Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac, ax	a,b,g,n,ac 802.11 a, b, g, n, ac
USB
Type-C, USB 3.2
Sensors
Accelerometer, Gyroscope, Compass, Barometer	Accelerometer, Gyroscope, Pedometer, Compass, Heart rate, Thermometer, Barometer, Step detector, ECG, Blood Oxygen, Ambient light sensor
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou
Other
NFC, Infrared	NFC

Multimedia

Headphones
No 3.5mm jack
Speakers
Earpiece, Multiple speakers	Loudspeaker

Cellular

5G Bands
n1, n3, n5, n7, n8, n28, n38, n40, n41, n48, n66, n77, n78, n79, SA, NSA
4G (FDD) Bands
1, 3, 4, 5, 7, 8, 18, 19, 26, 28, 66
4G (TDD) Bands
34, 38, 39, 40, 41, 42, 48
3G Bands
1, 2, 4, 5, 6, 8	1, 2, 4, 5, 8
Data Speed
	LTE
SIM type
Dual Nano SIM + eSIM	eSIM

Alternative variants

With 512GB internal storage

Memory	512GB

With 16GB RAM and 512GB internal storage

Memory	16GB/512GB

With 16GB RAM and 1TB internal storage

Memory	16GB/1024GB

Links

Full specifications
Xiaomi 15 Specs	Samsung Galaxy Watch Ultra (2025) Specs
PhoneArena Review
Xiaomi 15 Review