Samsung Galaxy M31 vs Samsung Galaxy S21 vs Samsung Galaxy S9 - specs comparison

Display

Size:

6.4 inches

6.2 inches

5.8 inches

Resolution:

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

2400 x 1080 pixels, 20:9 ratio, 424 PPI

2960 x 1440 pixels, 18.5:9 ratio, 568 PPI

Technology:

Super AMOLED

Dynamic AMOLED

Super AMOLED

Screen-to-body:

83.97 %

86.06 %

84.36 %

Peak brightness:

420 cd/m2 (nit)

1300 cd/m2 (nit)

Features:

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

120Hz refresh rate (adaptive), HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor

HDR support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor

Hardware

System chip:

Exynos 9611

Qualcomm Snapdragon 888

Qualcomm Snapdragon 845 SDM845

Processor:

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

Octa-core, 2840 MHz, Kryo 680, 64-bit, 5 nm

Octa-core, 2800 MHz, Kryo 385, 64-bit, 10 nm

GPU:

Mali-G72 MP3

Adreno 660

Adreno 630

RAM:

6GB LPDDR4

8GB LPDDR5

4GB LPDDR4

Internal storage:

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

128GB (UFS 3.0), not expandable

64GB

Storage expansion:

microSDXC up to 512 GB

microSDXC up to 400 GB

Device type:

Smartphone

OS:

Android (11, 10), Samsung One UI

Android (11), Samsung One UI

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

Battery

Capacity:

6000 mAh

4000 mAh

3000 mAh

Type:

Li - Polymer, Not user replaceable

Li - Ion, Not user replaceable

Charging:

Fast charging

Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging

Qualcomm Quick Charge 2.0, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging

Max charge speed:

Wired: 15.0W

Wired: 25.0W; Wireless: 15.0W

Camera

Rear:

Quad camera

Triple camera

Single camera

Main camera:

64 MP (PDAF)

12 MP (OIS, PDAF)

Specifications:

F1.8; 26 mm; 1/1.7"; 0.8 μm

F1.8; 26 mm; 1/1.76"; 1.8 μm

F1.5/F2.4; 1/2.55"; 1.4 μm

Second camera:

8 MP (Ultra-wide)

64 MP (Telephoto, OIS, PDAF)

Specifications:

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

Aperture size: F2.0; Focal Length: 29 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm

Third camera:

5 MP (Macro)

12 MP (Ultra-wide, Autofocus)

Specifications:

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

Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm

Fourth camera:

5 MP (Depth information)

Specifications:

Aperture size: F2.2

Video recording:

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

7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)

3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)

Features:

Hyperlapse, EIS

OIS, HDR, Hyperlapse, Continuous autofocus, Video light, EIS

HDR, Time-lapse video, Hyperlapse, Continuous autofocus, Object tracking, Picture-taking during video recording, Video calling, Video sharing

Front:

32 MP (HDR, Slow-motion videos)

10 MP (PDAF, HDR)

8 MP (Autofocus, HDR)

Video capture:

1920x1080 (Full HD)

3840x2160 (4K UHD) (60 fps)

2560x1440 (QHD) (30 fps)

Design

Dimensions:

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

5.97 x 2.80 x 0.31 inches (151.7 x 71.2 x 7.9 mm)

5.81 x 2.70 x 0.33 inches (147.7 x 68.7 x 8.5 mm)

Weight:

6.74 oz (191.0 g)

6.03 oz (171.0 g)

5.75 oz (163.0 g)

Materials:

Back: Plastic; Frame: Plastic

Back: Plastic; Frame: Aluminum

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

Resistance:

Water, Dust; IP68

Biometrics:

2D Face unlock, Fingerprint (touch)

2D Face unlock, Ultrasonic in-screen fingerprint

Iris scanner, 2D Face unlock, Fingerprint (touch)

Features:

Notification light

Keys:

Right: Volume control, Lock/Unlock key

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

Colors:

Blue, Black, Red

Phantom pink, Violet, Gray, White

Midnight black, Coral blue, Titanium gray, Lilac purple, Burgundy red, Sunrise gold, Ice blue

Cellular

5G:

n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave

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), 12(700 a), 13(700 c), 14(700 PS), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 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), 19(800 Upper), 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), 40(2300), 41(2600+)

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

Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46

UMTS:

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

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

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

Data Speed:

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

LTE-A Pro Cat 18 (1200/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA

Dual SIM:

Yes

SIM type:

Nano SIM

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack

No 3.5mm jack

3.5mm jack

Speakers:

Earpiece, Loudspeaker

Earpiece, Multiple speakers

Features:

Dolby Atmos

32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus

32-Bit DAC, aptX-HD

Screen mirroring:

Wireless screen share

Radio:

FM

FM, Stereo, RDS

FM

Additional microphone(s):

for Noise cancellation

for Noise cancellation, Video recording

for Noise cancellation

Connectivity & Features

Bluetooth:

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; MIMO, Wi-Fi Direct, Hotspot

USB:

Type-C (reversible), USB 2.0

Type-C (reversible), USB 3.2

Type-C (reversible), USB 3.1

Features:

Charging

Charging, Headphones port, OTG, Video out

Charging, OTG, Video out

Location:

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

GPS, A-GPS, Glonass, Galileo, BeiDou

Sensors:

Accelerometer, Gyroscope, Compass

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

Other:

NFC

NFC, ANT+

Hearing aid compatible:

M3, T3

Regulatory Approval

FCC approval:

Date approved:

Feb 07, 2020

Dec 08, 2020

Jan 11, 2018

FCC ID value:

A3LSMM315F link

A3LSMG991U link

A3LSMG960U link

Measured SAR:

Head:

0.42 W/kg

0.36 W/kg

0.35 W/kg

Body:

0.41 W/kg

1.08 W/kg

0.96 W/kg

Simultaneous Transmission:

1.54 W/kg

3.96 W/kg

1.59 W/kg

Wireless Router:

0.74 W/kg

1.09 W/kg

0.95 W/kg

Phablet:

2.49 W/kg

Buyers information

Price:

€ 240

$ 800

$ 720

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

C to C Data Cable, Ejection Pin

Availability

Officially announced:

Feb 25, 2020

Jan 14, 2021

Feb 25, 2018