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Samsung Galaxy M21 vs Samsung Galaxy A31 Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.

Comparison mode:
Specs Size
Differences only
Samsung Galaxy M21
Samsung Galaxy A31
Samsung Galaxy M21 Samsung Galaxy A31
Released · Mar 23, 2020
Released · Apr 27, 2020
6.4-inch · 2340x1080px
6.4-inch · 2400x1080px
Triple camera
Quad camera
4GB · 64GB
4GB · 64GB
6000 mAh
5000 mAh

Availability

Officially announced
Mar 18, 2020 Mar 24, 2020
Prices (MSRP)
€300

Design

Dimensions
6.26 x 2.96 x 0.35 inches
159.0 x 75.1 x 8.9 mm 		6.27 x 2.88 x 0.34 inches
159.3 x 73.1 x 8.6 mm
Weight
6.63 oz / 188.0 g 6.53 oz / 185.0 g
Materials
Back: Plastic
Frame: Plastic 		Back: Plastic
Biometrics
2D Face unlock, Fingerprint (touch) Optical in-screen fingerprint
Keys
Right: Volume control, Lock/Unlock key Right: Volume control, Lock/Unlock key
Colors
Midnight blue, Raven black Prism Crush black, Prism Crush blue, Prism Crush red, Prism Crush white

Display

Size
6.4-inch, 84.11% screen-to-body 6.4-inch, 84.88% screen-to-body
Type
Super AMOLED, 420 nits Super AMOLED, 60Hz
Resolution
2340x1080px, 19.5:9 ratio, 403 PPI 2400x1080px, 20:9 ratio, 411 PPI
Protection
Corning Gorilla Glass 3
Features
Scratch-resistant glass, Proximity sensor

Hardware

System chip
Exynos 9611 (10 nm) MediaTek Helio P65 MT6768 (12 nm)
Processor
Octa-core
4x2.3GHz Cortex-A73
4x1.7G​Hz Cortex-A53 		Octa-core
2x2.0GHz Cortex-A75
6x2.0G​Hz Cortex-A55
GPU
Mali-G72 MP3 Mali-G52 MC2
Memory
4GB (LPDDR4)/64GB
6GB/128GB 		4GB (LPDDR4)/64GB (eMMC 5.1)
6GB/128GB
Storage expansion
microSDXC up to 512 GB microSDXC up to 512 GB
OS
Android (11, 10) Android (10)

Battery

Type
6000 mAh, Li - Polymer 5000 mAh, Li - Polymer
Charging
Fast charging Fast charging
Charge speed
Wired: 15.0W

Camera

Rear
Triple camera Quad camera
Main camera
48 MP (PDAF)
Aperture size: F2.0
Focal length: 26 mm
Sensor size: 1/2"
Pixel size: 0.8 μm 		48 MP (PDAF)
Aperture size: F2.0
Focal length: 26 mm
Sensor size: 1/2"
Pixel size: 0.8 μm
Second camera
8 MP (Ultra-wide)
Aperture size: F2.2
Focal Length: 12 mm
Sensor size: 1/4"
Pixel size: 1.12 μm 		8 MP (Ultra-wide)
Aperture size: F2.2
Sensor size: 1/4"
Pixel size: 1.12 μm
Third camera
5 MP (Depth information)
Aperture size: F2.2 		5 MP (Macro)
Aperture size: F2.4
Fourth camera
5 MP (Depth information)
Aperture size: F2.4
Flash
LED LED
Video recording
4K UHD (30 fps), 1080p, 720p (240 fps)
EIS 		1080p (30 fps)
Front
20 MP (HDR)
Video capture: 1080p 		20 MP
Video capture: 1080p

Connectivity & Features

Bluetooth
5.0 5.0
WLAN
a,b,g,n,ac,dual-band
Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac 		a,b,g,n,ac,dual-band
Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac
USB
Type-C, USB 2.0 Type-C, USB 2.0
Sensors
Accelerometer, Gyroscope, Proximity sensor Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Other
NFC

Multimedia

Headphones
3.5mm jack 3.5mm jack
Speakers
Earpiece, Loudspeaker Earpiece, Loudspeaker
Features
Dolby Atmos
Screen mirroring
Wireless screen share Wireless screen share
Radio
FM
Additional microphone(s)
Noise cancellation

Cellular

4G (FDD) Bands
1, 3, 5, 7, 8, 20 1, 2, 3, 4, 5, 7, 8, 20
4G (TDD) Bands
38, 40, 41 38, 40, 41
3G Bands
1, 2, 5, 8 1, 2, 5, 8
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
Dual SIM
Yes Yes
SIM type
Nano SIM Nano SIM

Regulatory Approval

FCC approval
Date approved: Mar 08, 2020
FCC ID value: A3LSMA315GL
Measured SAR
Head: 0.53 W/kg
Body: 0.56 W/kg
Simultaneous Transmission: 1.42 W/kg
Wireless Router: 0.65 W/kg
Phablet: 0.89 W/kg

Alternative variants

with 128GB storage
Memory 6GB/128GB
with 128GB storage
Memory 6GB/128GB
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