Samsung Galaxy M31 vs realme 7 Pro vs Samsung Galaxy M21 - specs comparison

Display

Size:

6.4 inches

Resolution:

2340 x 1080 pixels, 19.5:9 ratio, 403 PPI

2400 x 1080 pixels, 20:9 ratio, 411 PPI

2340 x 1080 pixels, 19.5:9 ratio, 403 PPI

Technology:

Super AMOLED

Screen-to-body:

83.97 %

82.64 %

84.11 %

Peak brightness:

420 cd/m2 (nit)

Features:

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

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

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

Hardware

System chip:

Exynos 9611

Qualcomm Snapdragon 720G SM7125

Exynos 9611

Processor:

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

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

GPU:

Mali-G72 MP3

Adreno 618

Mali-G72 MP3

RAM:

6GB LPDDR4

8GB LPDDR4

4GB LPDDR4

Internal storage:

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

128GB (UFS 2.1)

64GB, available to use: 49 GB

Storage expansion:

microSDXC up to 512 GB

microSDXC

microSDXC up to 512 GB

Device type:

Smartphone

OS:

Android (11, 10), Samsung One UI

Android (10)

Android (11, 10), Samsung One UI

Battery

Capacity:

6000 mAh

4500 mAh

6000 mAh

Type:

Li - Polymer, Not user replaceable

Charging:

Fast charging

Max charge speed:

Wired: 15.0W

Wired: 65.0W

Camera

Rear:

Quad camera

Triple camera

Main camera:

64 MP (PDAF)

48 MP (PDAF)

Specifications:

F1.8; 26 mm; 1/1.7"; 0.8 μm

F2.0; 26 mm; 1/2"; 0.8 μm

Second camera:

8 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm

Aperture size: F2.3; Focal Length: 16 mm; Sensor size: 1/4"; 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)

2 MP (Macro)

5 MP (Depth information)

Specifications:

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

Aperture size: F2.4

Aperture size: F2.2

Fourth camera:

5 MP (Depth information)

2 MP (Black and White)

Specifications:

Aperture size: F2.2

Aperture size: F2.4

Video recording:

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

Hyperlapse, EIS

HDR, EIS

EIS

Front:

32 MP (HDR, Slow-motion videos)

32 MP (Slow-motion videos)

20 MP (HDR)

Video capture:

1920x1080 (Full HD)

Design

Dimensions:

6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)

6.33 x 2.93 x 0.34 inches (160.9 x 74.3 x 8.7 mm)

6.26 x 2.96 x 0.35 inches (159.0 x 75.1 x 8.9 mm)

Weight:

6.74 oz (191.0 g)

6.42 oz (182.0 g)

6.63 oz (188.0 g)

Materials:

Back: Plastic; Frame: Plastic

Resistance:

Splash

Biometrics:

2D Face unlock, Fingerprint (touch)

In-screen fingerprint

2D Face unlock, Fingerprint (touch)

Keys:

Right: Volume control, Lock/Unlock key

Left: Volume control; Right: Lock/Unlock key

Right: Volume control, Lock/Unlock key

Colors:

Blue, Black, Red

Mirror blue, Mirror silver

Midnight blue, Raven 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), 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), 20(800 DD), 28(700 APT)

Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)

LTE (TDD):

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

UMTS:

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

Bands 5(850), 8(900), 2(1900), 1(2100)

Data Speed:

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

Dual SIM:

Yes

SIM type:

Nano SIM

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack

Speakers:

Earpiece, Loudspeaker

Earpiece, Multiple speakers

Earpiece, Loudspeaker

Features:

Dolby Atmos

Screen mirroring:

Wireless screen share

Radio:

FM

Additional microphone(s):

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

USB:

Type-C (reversible), USB 2.0

Features:

Charging

Charging, OTG

Charging

Location:

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

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

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

Sensors:

Accelerometer, Gyroscope, Compass

Accelerometer, Gyroscope

Other:

NFC

Regulatory Approval

FCC approval:

Date approved:

Feb 07, 2020

FCC ID value:

A3LSMM315F link

Measured SAR:

Head:

0.42 W/kg

Body:

0.41 W/kg

Simultaneous Transmission:

1.54 W/kg

Wireless Router:

0.74 W/kg

Buyers information

Price:

€ 240

€ 299

User Manual:

This is the official Samsung Galaxy M31 User Guide in English provided from the manufacturer.

In The Box:

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

65W Dart Charger, USB Type-C Cable, Protect Case, Protect Film, SIM Card Tool, Important Info Booklet with Warranty Card

This is the official Samsung Galaxy M21 User Guide in English provided from the manufacturer.

Availability

Officially announced:

Feb 25, 2020

Sep 03, 2020

Mar 18, 2020