Samsung Galaxy A51 vs OnePlus 8 vs Samsung Galaxy A42

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

Comparison mode:

Display

Size:

6.5 inches
6.5 inches
6.6 inches

Resolution:

2400 x 1080 pixels, 20:9 ratio, 405 PPI
2400 x 1080 pixels, 20:9 ratio, 402 PPI
1600 x 720 pixels, 20:9 ratio, 266 PPI

Technology:

Super AMOLED
AMOLED
Super AMOLED

Screen-to-body:

87.37 %
88.65 %
84.26 %

Peak brightness:

1100 cd/m2 (nit)

Features:

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

Hardware

System chip:

Samsung Exynos 9611
Qualcomm Snapdragon 865 SM8250
Qualcomm Snapdragon 750G SM7225

Processor:

Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm
Octa-core, 2840 MHz, Kryo 585, 64-bit, 7 nm
Octa-core, 2200 MHz, Kryo 570, 64-bit, 8 nm

GPU:

Mali-G72 MP3
Adreno 650
Adreno 619

RAM:

4GB LPDDR4
8GB LPDDR4
4GB LPDDR4

Internal storage:

128GB, available to use: 105.9 GB
128GB (UFS 3.0), not expandable
128GB, available to use: 106 GB

Storage expansion:

microSDXC up to 512 GB
microSDXC up to 1000 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

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

Battery

Capacity:

4000 mAh
4300 mAh
5000 mAh

Type:

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

Battery life test results:

Charging:

Fast charging
OnePlus Warp Charge
Samsung Adaptive Fast Charging

Max charge speed:

Wired: 30.0W
Wired: 15.0W

Camera

Rear:

Quad camera
Triple camera
Quad camera

Main camera:

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

Specifications:

Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.8; Focal length: 25 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.8; Pixel size: 0.8 μm

Second camera:

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

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 14 mm
Aperture size: F2.2

Third camera:

5 MP (Macro)
2 MP (Macro)
5 MP (Macro)

Specifications:

Aperture size: F2.4; Focal Length: 40 mm
Aperture size: F2.4; Pixel size: 1.75 μm
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) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (480 fps)
3840x2160 (4K UHD) (30 fps), 1280x720 (HD) (480 fps)

Features:

Hyperlapse, EIS
OIS, HDR, Time-lapse video, EIS

Front:

32 MP (HDR)
16 MP (EIS, HDR)
20 MP (Autofocus)

Video capture:

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

Design

Dimensions:

6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)
6.31 x 2.87 x 0.31 inches (160.2 x 72.9 x 8 mm)
6.47 x 2.99 x 0.34 inches (164.4 x 75.9 x 8.6 mm)

Weight:

6.07 oz (172.0 g)
6.35 oz (180.0 g)
6.81 oz (193.0 g)

Materials:

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

Biometrics:

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

Keys:

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

Colors:

Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Glacial green
Prism Dot black, Prism Dot white, Prism Dot grey

Cellular

5G:

n2, n5, n41, n66, n71, SA, NSA
n1, n3, n5, n7, n8, n28, Sub-6

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), 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), 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), 17(700 b), 20(800 DD), 28(700 APT)

LTE (TDD):

Bands 38(2600), 39(1900+), 41(2600+)
Bands 34(2000), 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)
Bands 38(2600), 40(2300), 41(2600+)

UMTS:

Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 6(800), 8(900)
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)

Data Speed:

LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
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

Dual SIM:

Yes
Shared with microSD

SIM type:

Nano SIM
Nano SIM
Nano SIM

Multimedia

Headphones:

3.5mm jack
No 3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Multiple speakers
Earpiece, Loudspeaker

Features:

Dolby Atmos
Dolby Atmos, aptX-HD

Screen mirroring:

Wireless screen share
DLNA, Wireless screen share
Wireless screen share

Radio:

FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

5.0
5.1
5.0

Wi-Fi:

802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, ax (Wi-Fi 6), dual-band; MIMO, Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot

USB:

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

Features:

Charging, OTG
Charging, Headphones port, OTG
Charging

Location:

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

Sensors:

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

Other:

NFC, ANT+
NFC
NFC

Regulatory Approval

FCC approval:

Date approved:

Nov 28, 2019
Jan 24, 2021
Apr 08, 2021

FCC ID value:

A3LSMA515FN
2ABZ2-EE103
A3LSMA426U

Measured SAR:

Head:

0.89 W/kg
1.01 W/kg
1.11 W/kg

Body:

1.18 W/kg
0.78 W/kg
1.25 W/kg

Simultaneous Transmission:

1.56 W/kg
1.59 W/kg
1.59 W/kg

Wireless Router:

1.12 W/kg
0.92 W/kg
1.06 W/kg

Phablet:

2.76 W/kg
3.81 W/kg

Buyers information

Price:

$ 400
$ 699
€ 340

User Manual:

This is the official Samsu​ng Galaxy A51 User Guide in English provided from the manufacturer.
This is the official OnePl​us 8 User Guide in English provided from the manufacturer.
This is the official Samsu​ng Galaxy A42 User Guide in English provided from the manufacturer.

In The Box:

Warp Charge 30 Power Adapter, Warp Type-C Cable (Support USB 2.0), Quick Start Guide, Welcome Letter, Safety Information and Warranty Card, LOGO Sticker, Screen Protector, SIM Tray Ejector

Availability

Officially announced:

Dec 12, 2019
Apr 14, 2020
Sep 02, 2020
FCC OKs Cingular\'s purchase of AT&T Wireless