Google Pixel 4 vs Samsung Galaxy A51 vs Samsung Galaxy A31

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

Display

Size:

5.7 inches
6.5 inches
6.4 inches

Resolution:

2280 x 1080 pixels, 19:9 ratio, 443 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI
2400 x 1080 pixels, 20:9 ratio, 411 PPI

Technology:

OLED
Super AMOLED
Super AMOLED

Screen-to-body:

77.32 %
87.37 %
84.88 %

Features:

90Hz refresh rate, HDR video support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
60Hz refresh rate, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
60Hz refresh rate, Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 855 SM8150
Samsung Exynos 9611
MediaTek Helio P65 MT6768

Processor:

Octa-core, 2840 MHz, Kryo 485, 64-bit, 7 nm
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm
Octa-core, 2000 MHz, Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm

GPU:

Adreno 640
Mali-G72 MP3
Mali-G52 MC2

RAM:

6GB LPDDR4
4GB LPDDR4
4GB LPDDR4

Internal storage:

64GB, not expandable
128GB, available to use: 105.9 GB
64GB (eMMC 5.1), available to use: 46.2 GB

Storage expansion:

microSDXC up to 512 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (11, 10)
Android (10), Samsung One UI
Android (10), Samsung One UI

Battery

Capacity:

2800 mAh
4000 mAh
5000 mAh

Type:

Not user replaceable
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable

Battery life test results:

Charging:

USB Power Delivery, Qi wireless charging
Fast charging
Fast charging

Max charge speed:

Wired: 15.0W

Camera

Rear:

Dual camera
Quad camera
Quad camera

Main camera:

12.2 MP (OIS, PDAF)
48 MP (PDAF)
48 MP (PDAF)

Specifications:

Aperture size: F1.7; Focal length: 28 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm

Second camera:

16 MP (Telephoto, OIS, PDAF)
12 MP (Ultra-wide)
8 MP (Ultra-wide)

Specifications:

Aperture size: F2.4; Focal Length: 45 mm; Pixel size: 1 μm
Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm

Third camera:

5 MP (Macro)
5 MP (Macro)

Specifications:

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

Fourth camera:

5 MP (Depth information)
5 MP (Depth information)

Specifications:

Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.4

Video recording:

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
1920x1080 (Full HD) (30 fps)

Features:

OIS, Time-lapse video, EIS
Hyperlapse, EIS

Front:

8 MP (Dual-Camera, Time-of-Flight (ToF))
32 MP (HDR)
20 MP

Video capture:

1920x1080 (Full HD)
1920x1080 (Full HD)
1920x1080 (Full HD)

Design

Dimensions:

5.79 x 2.71 x 0.32 inches (147.1 x 68.8 x 8.2 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)
6.27 x 2.88 x 0.34 inches (159.3 x 73.1 x 8.6 mm)

Weight:

5.71 oz (162.0 g)
6.07 oz (172.0 g)
6.53 oz (185.0 g)

Materials:

Back: Glass (Corning Gorilla Glass 5); Frame: Aluminum
Back: Plastic; Frame: Plastic
Back: Plastic

Resistance:

Water, Dust; IP68

Biometrics:

3D Face unlock
2D Face unlock, In-screen fingerprint
In-screen fingerprint

Keys:

Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key

Colors:

Just black, Clearly white, Oh so orange
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Prism Crush black, Prism Crush blue, Prism Crush red, Prism Crush white

Cellular

LTE (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), 17(700 b), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 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), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 20(800 DD)

LTE (TDD):

Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)
Bands 38(2600), 39(1900+), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)

UMTS:

850, 900, 1700/2100, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz
850, 900, 1900, 2100 MHz

Data Speed:

LTE-A Pro Cat 18 (1200/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes
Yes

SIM type:

Nano SIM, eSIM
Nano SIM
Nano SIM

Multimedia

Headphones:

No 3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Multiple speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

aptX-HD
Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

5.0
5.0
5.0

Wi-Fi:

802.11 a, b, g, n, ac, dual-band; MIMO, Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot

USB:

Type-C (reversible), USB 3.1
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0

Features:

Charging, Headphones port
Charging, OTG
Charging, OTG

Location:

GPS, A-GPS, Glonass, Galileo, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning

Sensors:

Accelerometer, Gyroscope, Compass, Barometer
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass

Other:

NFC
NFC, ANT+
NFC

Hearing aid compatible:

M3, T3

Regulatory Approval

FCC approval:

Date approved:

Sep 03, 2019
Nov 28, 2019

FCC ID value:

A4RG020I link
A3LSMA515FN link

Measured SAR:

Head:

1.20 W/kg
0.89 W/kg

Body:

1.34 W/kg
1.18 W/kg

Simultaneous Transmission:

1.59 W/kg
1.56 W/kg

Wireless Router:

1.01 W/kg
1.12 W/kg

Phablet:

2.76 W/kg

Buyers information

Price:

$ 799
$ 400
€ 300

User Manual:

This is the official Samsu​ng Galaxy A51 User Guide in English provided from the manufacturer.

In The Box:

18W USB-C power adapter, 1m USB-C to USB-C cable, Quick Start Guide, Quick Switch Adapter, SIM tool

Availability

Officially announced:

Oct 15, 2019
Dec 12, 2019
Mar 24, 2020
This copy is for your personal, non-commercial use only. You can order presentation-ready copies for distribution to your colleagues, clients or customers at https://www.parsintl.com/phonearena or use the Reprints & Permissions tool that appears at the bottom of each web page. Visit https://www.parsintl.com/ for samples and additional information.
FCC OKs Cingular\'s purchase of AT&T Wireless