Microsoft Surface Duo vs Samsung Galaxy S21 Ultra Specs Comparison

Compare phone and tablet specifications of up to three devices at once.

Display

Size:

8.1 inches

6.8 inches

Resolution:

2700 x 1800 pixels, 3:2 ratio, 401 PPI

3200 x 1440 pixels, 20:9 ratio, 516 PPI

Technology:

AMOLED

Dynamic AMOLED

Refresh rate:

120Hz (adaptable)

Screen-to-body:

71.93 %

89.33 %

Peak brightness:

1500 cd/m2 (nit)

Features:

360° folding, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor

HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor

Front cover display:

5.6 inches, 1800 x 1350 pixels, AMOLED, Scratch-resistant glass (Corning Gorilla Glass 5), Part of the main display

Rear cover display:

5.6 inches, 1350 pixels 1800 x, AMOLED, Scratch-resistant glass (Corning Gorilla Glass 5), Part of the main display

Hardware

System chip:

Qualcomm Snapdragon 855 SM8150 (7 nm)

Qualcomm Snapdragon 888 SM8350 (5 nm)

Processor:

Octa-core, 2840 MHz, Kryo 485, 64-bit

Octa-core, 1x 2.84GHz Kryo 680 + 3x 2.42GHz Kryo 680 + 4x 1.80GHz Kryo 680, 64-bit

GPU:

Adreno 640

Adreno 660

RAM:

6GB LPDDR4

12GB LPDDR5

Internal storage:

128GB (UFS 3.0), not expandable

128GB (UFS 3.1), not expandable

Device type:

Smartphone

OS:

Android (10)

Android (13, 12, 11), Samsung One UI

Battery

Capacity:

3577 mAh

5000 mAh

Type:

Not user replaceable

Li - Polymer, Not user replaceable

Charging:

Fast charging

Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging

Max charge speed:

Wired: 18.0W

Wired: 25.0W; Wireless: 15.0W

Camera

Rear:

Single camera, Doubles as a selfie camera

Quad camera

Main camera:

11 MP (PDAF)

108 MP (OIS, Laser and PDAF)

Specifications:

F2.0

F1.8; 24 mm; 1/1.33"; 0.8 μm

Second camera:

10 MP (Telephoto, OIS, PDAF)

Specifications:

Optical zoom: 3.0x; Aperture size: F2.4; Focal Length: 70 mm; Sensor size: 1/3.2"; Pixel size: 1.22 μm

Third camera:

12 MP (Ultra-wide, PDAF)

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm

Fourth camera:

10 MP (Periscope, OIS, PDAF)

Specifications:

Optical zoom: 10.0x; Aperture size: F4.9; Focal Length: 240 mm; Sensor size: 1/3.2"; Pixel size: 1.22 μm

Flash:

LED

Video recording:

3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (60 fps)

7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)

Features:

EIS

OIS, HDR, Hyperlapse, Video light, EIS

Front:

40 MP (PDAF, HDR)

Video capture:

3840x2160 (4K UHD) (60 fps)

Design

Dimensions:

7.36 x 5.72 x 0.19 inches (186.9 x 145.2 x 4.8 mm)

6.50 x 2.98 x 0.35 inches (165.1 x 75.6 x 8.9 mm)

Folded:

(145.2 x 93.3 x 9.9 mm)

Weight:

8.82 oz (250.0 g)

8.04 oz (229.0 g)

Materials:

Back: Glass (Corning Gorilla Glass 5)

Back: Glass (Corning Gorilla Glass Victus); Frame: Aluminum

Resistance:

Water, Dust; IP68

Biometrics:

Fingerprint (touch)

2D Face unlock, Ultrasonic in-screen fingerprint

Keys:

Right: Volume control, Lock/Unlock key

Colors:

Glacier

Phantom black, Silver

Cellular

5G:

n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave

4G (FDD):

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3)

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 30(2300 WCS), 66(AWS-3), 71(600)