Samsung Galaxy A6+ vs Samsung Galaxy A51 vs Samsung Galaxy M31

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

Display

Size:

6.0 inches
6.5 inches
6.4 inches

Resolution:

2220 x 1080 pixels, 18.5:9 ratio, 411 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI

Technology:

Super AMOLED
Super AMOLED
Super AMOLED

Screen-to-body:

75.31 %
87.37 %
83.97 %

Peak brightness:

420 cd/m2 (nit)

Features:

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

Hardware

System chip:

Qualcomm Snapdragon 450 SDM450
Samsung Exynos 9611
Exynos 9611

Processor:

Octa-core, 1800 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm
Octa-core, 2300 MHz, Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm

GPU:

Adreno 506
Mali-G72 MP3
Mali-G72 MP3

RAM:

3GB LPDDR3
4GB LPDDR4
6GB LPDDR4

Internal storage:

32GB, available to use: 22.4 GB
128GB, available to use: 105.9 GB
64GB (UFS 2.1), available to use: 49 GB

Storage expansion:

microSDXC up to 256 GB
microSDXC up to 512 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (9.0 Pie, 8.0 Oreo), Samsung One UI
Android (10), Samsung One UI
Android (10), Samsung One UI

Battery

Capacity:

3500 mAh
4000 mAh
6000 mAh

Type:

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

Battery life test results:

Charging:

Fast charging
Fast charging

Max charge speed:

Wired: 15.0W

Camera

Rear:

Dual camera
Quad camera
Quad camera

Main camera:

16 MP (PDAF)
48 MP (PDAF)
64 MP (PDAF)

Specifications:

Aperture size: F1.7; Focal length: 26 mm; Sensor size: 1/2.8"; Pixel size: 1.12 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm

Second camera:

5 MP (Depth information)
12 MP (Ultra-wide)
8 MP (Ultra-wide)

Specifications:

Aperture size: F1.9; Focal Length: 24 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 12 mm; 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: F2.2; Focal Length: 25 mm; Sensor size: 1/5"; Pixel size: 1.12 μm

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: F2.2

Video recording:

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

Features:

Video calling, Video sharing
Hyperlapse, EIS
Hyperlapse, EIS

Front:

24 MP (Flash)
32 MP (HDR)
32 MP (HDR, Slow-motion videos)

Video capture:

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

Design

Dimensions:

6.31 x 2.98 x 0.31 inches (160.2 x 75.7 x 7.9 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)
6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)

Weight:

6.74 oz (191.0 g)
6.07 oz (172.0 g)
6.74 oz (191.0 g)

Materials:

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

Biometrics:

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

Keys:

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

Colors:

Black, Gold, Lavender, Blue
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Blue, Black, Red

Cellular

LTE (FDD):

Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
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), 20(800 DD), 26(850+), 28(700 APT), 66(AWS-3)

LTE (TDD):

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

UMTS:

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

Data Speed:

LTE-A Cat 6 (300/50 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

SIM type:

Nano SIM
Nano SIM
Nano SIM

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

Dolby Atmos, Album art cover, Background playback
Dolby Atmos
Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM, RDS, Recording option
FM
FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

4.2, EDR
5.0
5.0

Wi-Fi:

802.11 a, b, g, n, dual-band; 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:

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

Features:

Charging, Mass storage device
Charging, OTG
Charging

Location:

GPS, A-GPS, Glonass, BeiDou
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, Hall (for flip covers)
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass

Other:

NFC, ANT+, VoIP, Tethering, Computer sync, OTA sync
NFC, ANT+
NFC

Regulatory Approval

FCC approval:

Date approved:

Apr 07, 2018
Nov 28, 2019
Feb 07, 2020

FCC ID value:

A3LSMA605F link
A3LSMA515FN link
A3LSMM315F link

Measured SAR:

Head:

0.24 W/kg
0.89 W/kg
0.42 W/kg

Body:

0.97 W/kg
1.18 W/kg
0.41 W/kg

Simultaneous Transmission:

1.33 W/kg
1.56 W/kg
1.54 W/kg

Wireless Router:

1.05 W/kg
1.12 W/kg
0.74 W/kg

Phablet:

1.96 W/kg
2.76 W/kg

Buyers information

Price:

$ 400
€ 240

User Manual:

This is the official Samsu​ng Galaxy A51 User Guide in English provided from the manufacturer.
This is the official Samsu​ng Galaxy M31 User Guide in English provided from the manufacturer.

In The Box:

Charger, microUSB cable, Headphones, Quick Start Guide
15W fast charger, Data cable, Ejection pin, User Manual

Availability

Officially announced:

May 02, 2018
Dec 12, 2019
Feb 25, 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