Samsung Galaxy A51 5G vs Samsung Galaxy S21 Ultra Specs Comparison

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

Display

Size:

6.5 inches

6.8 inches

Resolution:

2400 x 1080 pixels, 20:9 ratio, 405 PPI

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

Technology:

Super AMOLED

Dynamic AMOLED

Refresh rate:

60Hz

120Hz (adaptable)

Screen-to-body:

87.37 %

89.33 %

Peak brightness:

1500 cd/m2 (nit)

Features:

Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

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

Hardware

System chip:

Samsung Exynos 980 (8 nm)

Qualcomm Snapdragon 888 SM8350 (5 nm)

Processor:

Octa-core, 2x 2.2GHz Cortex-A77 + 6x 1.8GHz Cortex-A55, 64-bit

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

GPU:

Mali-G76 MP5

Adreno 660

RAM:

6GB LPDDR4

12GB LPDDR5

Internal storage:

128GB, available to use: 105.3 GB

128GB (UFS 3.1), not expandable

Storage expansion:

microSDXC up to 1000 GB

Device type:

Smartphone

OS:

Android (11, 10), Samsung One UI

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

Battery

Capacity:

4500 mAh

5000 mAh

Type:

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: 25.0W

Wired: 25.0W; Wireless: 15.0W

Camera

Rear:

Quad camera

Main camera:

48 MP (PDAF)

108 MP (OIS, Laser and PDAF)

Specifications:

F2.0; 26 mm; 1/2"; 0.8 μm

F1.8; 24 mm; 1/1.33"; 0.8 μm

Second camera:

12 MP (Ultra-wide)

10 MP (Telephoto, OIS, PDAF)

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm

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

Third camera:

5 MP (Macro)

12 MP (Ultra-wide, PDAF)

Specifications:

Aperture size: F2.4; Focal Length: 40 mm

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

Fourth camera:

5 MP (Depth information)

10 MP (Periscope, OIS, PDAF)

Specifications:

Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm

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) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (480 fps)

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

Features:

Hyperlapse, EIS

OIS, HDR, Hyperlapse, Video light, EIS

Front:

32 MP (HDR)

40 MP (PDAF, HDR)

Video capture:

1920x1080 (Full HD)

3840x2160 (4K UHD) (60 fps)

Design

Dimensions:

6.26 x 2.90 x 0.34 inches (158.9 x 73.6 x 8.7 mm)

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

Weight:

6.60 oz (187.0 g)

8.04 oz (229.0 g)

Materials:

Back: Plastic; Frame: Aluminum

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

Resistance:

Water, Dust; IP68

Biometrics:

2D Face unlock, In-screen fingerprint

2D Face unlock, Ultrasonic in-screen fingerprint

Keys:

Right: Volume control, Lock/Unlock key

Colors:

Prism cube black

Phantom black, Silver

Cellular

5G:

n41, n71, SA, NSA

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), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)

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)