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Samsung Galaxy M51 vs Samsung Galaxy M31 vs Samsung Galaxy A72

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

Comparison mode:

Display

Size:

6.7 inches
6.4 inches
6.7 inches

Resolution:

2340 x 1080 pixels, 20:9 ratio, 385 PPI
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI
2400 x 1080 pixels, 20:9 ratio, 393 PPI

Technology:

Super AMOLED Plus
Super AMOLED
Super AMOLED

Refresh rate:

90Hz

Screen-to-body:

88.27 %
83.97 %
84.74 %

Peak brightness:

420 cd/m2 (nit)

Features:

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

Hardware

System chip:

Qualcomm Snapdragon 730 SM7150-AA
Exynos 9611
Qualcomm Snapdragon 720G SM7125

Processor:

Octa-core, 2200 MHz, Kryo 470, 64-bit, 8 nm
Octa-core, 2300 MHz, Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm
Octa-core, 2300 MHz, Kryo 465, 64-bit, 8 nm

GPU:

Adreno 618
Mali-G72 MP3
Adreno 618

RAM:

6GB LPDDR4
6GB LPDDR4
6GB

Internal storage:

128GB, available to use: 106 GB
64GB (UFS 2.1), available to use: 49 GB
128GB (UFS)

Storage expansion:

microSDXC up to 512 GB
microSDXC up to 512 GB
microSDXC up to 1024 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (10), Samsung One UI
Android (11, 10), Samsung One UI
Android (11), One UI 3.0 UI

Battery

Capacity:

7000 mAh
6000 mAh
5000 mAh

Type:

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

Charging:

Fast charging, Reverse charging
Fast charging
Qualcomm Quick Charge 2.0

Max charge speed:

Wired: 25.0W
Wired: 15.0W
Wired: 25.0W

Camera

Rear:

Quad camera
Quad camera
Quad camera

Main camera:

64 MP (PDAF)
64 MP (PDAF)
64 MP (OIS, PDAF)

Specifications:

Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.76"; Pixel size: 0.8 μm
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.7"; 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:

12 MP (Ultra-wide)
8 MP (Ultra-wide)
8 MP (Telephoto, OIS, Autofocus)

Specifications:

Aperture size: F2.2
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Optical zoom: 3.0x; Aperture size: F2.4; Pixel size: 1.0 μm

Third camera:

5 MP (Macro)
5 MP (Macro)
5 MP (Ultra-wide)

Specifications:

Aperture size: F2.4
Aperture size: F2.2; Focal Length: 25 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.2; Pixel size: 1.12 μm

Fourth camera:

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

Specifications:

Aperture size: F2.4
Aperture size: F2.2
Aperture size: F2.4; Pixel size: 1.12 μm

Video recording:

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

Features:

Hyperlapse, EIS
Continuous autofocus, Picture-taking during video recording

Front:

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

Video capture:

1920x1080 (Full HD)
1920x1080 (Full HD)
3840x2160 (4K UHD) (30 fps)

Design

Dimensions:

6.45 x 3.00 x 0.37 inches (163.9 x 76.3 x 9.5 mm)
6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)
6.50 x 3.05 x (165 x 77.4 x 8.4 mm)

Weight:

7.51 oz (213.0 g)
6.74 oz (191.0 g)
7.16 oz (203.0 g)

Materials:

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

Materials & Colors:

Black, Blue, White, Violet

Resistance:

Water, Dust; IP67

Biometrics:

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

Keys:

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

Colors:

Black, White
Blue, Black, Red

Cellular

LTE (FDD):

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), 26(850+), 28(700 APT), 66(AWS-3)
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)
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), 26(850+), 28(700 APT), 32(1500 L-band), 66(AWS-3)

LTE (TDD):

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

UMTS:

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

Dual SIM:

Yes
Yes
Shared with microSD

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
Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM, Stereo, RDS
FM

Additional microphone(s):

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; 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, 802.1x; Wi-Fi Direct, Hotspot

USB:

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

Features:

Charging
Charging
Charging, OTG

Location:

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

Other:

NFC
NFC
NFC

Regulatory Approval

FCC approval:

Date approved:

Feb 07, 2020
Jan 26, 2021

FCC ID value:

A3LSMM315F
A3LSMA725M

Measured SAR:

Head:

0.42 W/kg
0.29 W/kg

Body:

0.41 W/kg
0.30 W/kg

Simultaneous Transmission:

1.54 W/kg
1.56 W/kg

Wireless Router:

0.74 W/kg
0.59 W/kg

EU SAR:

Head:

0.23 W/kg

Body:

1.17 W/kg

Buyers information

Price:

€ 360
€ 240
€ 449

User Manual:

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

In The Box:

15W fast charger, Data cable, Ejection pin, User Manual

Availability

Officially announced:

Aug 31, 2020
Feb 25, 2020
Mar 17, 2021
FCC OKs Cingular\'s purchase of AT&T Wireless