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Samsung Galaxy A51 vs Google Pixel 4a

Compare phone and tablet specifications of up to three devices. Type a model name in the search field of our phone specs comparison tool or pick a popular device from the ones below.

from $319
from $425

Display

Size

6.5 inches
5.8 inches

Resolution

2400 x 1080 pixels, 20:9 ratio,
405 PPI
2340 x 1080 pixels, 19.5:9 ratio,
444 PPI

Technology

Super AMOLED
OLED

Screen-to-body

87.37 %
82.53 %

Features

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

Hardware

System chip

Samsung Exynos 9611
Qualcomm Snapdragon 730 SM7150-AA

Processor

Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm
Octa-core, 2200 MHz, Kryo 470, 64-bit, 8 nm

GPU

Mali-G72 MP3
Adreno 618

RAM

4GB LPDDR4
6GB LPDDR4

Internal storage

128GB, available to use: 105.9 GB
128GB, not expandable

Storage expansion

microSDXC up to 512 GB
 

Device type

Smartphone
Smartphone

OS

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

Battery

Capacity

4000 mAh
3140 mAh

Type

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

Battery life test results

Charging

Fast charging
USB Power Delivery

Max charge speed

 
Wired: 18.0W

Camera

Rear

Quad camera
Single camera

Main camera

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

Specifications

Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.7; Focal length: 27 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm

Second camera

12 MP (Ultra-wide)
 

Specifications

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

Third camera

5 MP (Macro)
 

Specifications

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

Fourth camera

5 MP (Depth information)
 

Specifications

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

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)

Features

Hyperlapse, EIS
EIS

Front

32 MP (HDR)
8 MP

Design

Dimensions

6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)
5.67 x 2.73 x 0.32 inches (144 x 69.4 x 8.2 mm)

Weight

6.07 oz (172.0 g)
the average is 6.3 oz (179 g)
5.04 oz (143.0 g)
the average is 6.3 oz (179 g)

Materials

Back: Plastic; Frame: Plastic
Back: Plastic; Frame: Plastic

Biometrics

2D Face unlock, In-screen fingerprint
Fingerprint (touch)

Keys

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

Colors

Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Just black

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), 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), 17(700 b), 18(800 Lower), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)

LTE (TDD)

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

UMTS

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

Data Speed

LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A Cat 11 (600/75 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM

 
Yes

SIM type

Nano SIM
Nano SIM, eSIM

Multimedia

Headphones

3.5mm jack
3.5mm jack

Speakers

Earpiece, Loudspeaker
Earpiece, Multiple speakers

Features

Dolby Atmos
aptX, aptX-HD

Screen mirroring

Wireless screen share
Wireless screen share

Radio

FM
 

Additional microphone(s)

for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth

5.0
5.1

Wi-Fi

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

USB

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

Features

Charging, OTG
Charging

Location

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

Sensors

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

Other

NFC, ANT+
NFC

Hearing aid compatible

 
M3, T4

Regulatory Approval

FCC approval

 
 

Date approved

Nov 28, 2019
Jun 25, 2020

FCC ID value: A3LSMA515FN link
FCC ID value: A4RG025J link

Measured SAR

 
 

Head

0.89 W/kg
1.18 W/kg

Body

1.18 W/kg
1.19 W/kg

Simultaneous Transmission

1.56 W/kg
1.59 W/kg

Wireless Router

1.12 W/kg
1.00 W/kg

Phablet

2.76 W/kg
 

Buyers information

Price

$ 400
$ 349

User Manual

Download the Samsu​ng Galaxy A51 Manual as a PDF file.
 

In The Box

 
18W USB-C power adapter, 1 m USB-C to USB-C cable (USB 2.0), Quick Start Guide, Quick Switch Adapter, SIM tool

Availability

Officially announced

Dec 12, 2019
Aug 03, 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.
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