Samsung Galaxy M31 vs Samsung Galaxy S21 vs Samsung Galaxy S9+

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

Display

Size:

6.4 inches
6.2 inches
6.2 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, 531 PPI

Technology:

Super AMOLED
Dynamic AMOLED
Super AMOLED

Screen-to-body:

83.97 %
86.06 %
83.68 %

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
6GB 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
Smartphone
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
3500 mAh

Type:

Li - Polymer, Not user replaceable
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
Dual camera

Main camera:

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

Specifications:

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: 1/1.76"; Pixel size: 1.8 μm
Aperture size: F1.5/F2.4; Focal length: 26 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm

Second camera:

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

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
Optical zoom: 2.0x; Aperture size: F2.4; Focal Length: 52 mm; Sensor size: 1/3.6"; Pixel size: 1 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, EIS, 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)
6.22 x 2.91 x 0.33 inches (158.1 x 73.8 x 8.5 mm)

Weight:

6.74 oz (191.0 g)
6.03 oz (171.0 g)
6.67 oz (189.0 g)

Materials:

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

Resistance:

Water, Dust; IP68
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
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, Polaris 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
Nano SIM
Nano SIM

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack
No 3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Multiple speakers
Earpiece, Multiple speakers

Features:

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

Screen mirroring:

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

Sensors:

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

Other:

NFC
NFC, ANT+
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
A3LSMG965U link

Measured SAR:

Head:

0.42 W/kg
0.36 W/kg
0.36 W/kg

Body:

0.41 W/kg
1.08 W/kg
0.79 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
1.04 W/kg

Phablet:

2.49 W/kg
3.94 W/kg

Buyers information

Price:

€ 240
$ 800
$ 840

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
C to C Data Cable, Ejection Pin

Availability

Officially announced:

Feb 25, 2020
Jan 14, 2021
Feb 25, 2018
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