Samsung Galaxy A31 vs Samsung Galaxy M21 Specs Comparison

Design

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

Display

Size
6.4-inch	6.4-inch
Resolution
2400x1080px, 20:9 ratio, 411 PPI	2340x1080px, 19.5:9 ratio, 403 PPI
Technology
Super AMOLED	Super AMOLED
Refresh rate
60Hz
Screen-to-body
84.88 %	84.11 %
Peak brightness
	420 cd/m2 (nit)
Features
Ambient light sensor, Proximity sensor	Scratch-resistant glass (Corning Gorilla Glass 3), Proximity sensor

Hardware

System chip
MediaTek Helio P65 MT6768 (12 nm)	Exynos 9611 (10 nm)
Processor
Octa-core 2x 2.0GHz Cortex-A75 + 6x 2.0GHz Cortex-A55	Octa-core 4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53
GPU
Mali-G52 MC2	Mali-G72 MP3
RAM
4GB (LPDDR4)	4GB (LPDDR4)
Internal storage
64GB (eMMC 5.1), available to use: 46.2 GB	64GB, available to use: 49 GB
Storage expansion
microSDXC up to 512 GB	microSDXC up to 512 GB
OS
Android (10), Samsung One UI	Android (11, 10), Samsung One UI

Battery

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

Camera

Rear
Quad camera	Triple 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 Sensor size: 1/4" Pixel size: 1.12 μm	8 MP (Ultra-wide) Aperture size: F2.2 Focal Length: 12 mm Sensor size: 1/4" Pixel size: 1.12 μm
Third camera
5 MP (Macro) Aperture size: F2.4	5 MP (Depth information) Aperture size: F2.2
Fourth camera
5 MP (Depth information) Aperture size: F2.4
Flash
LED	LED
Video recording
1920x1080 (Full HD) (30 fps)	3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps) EIS
Front
20 MP, Video capture: 1920x1080 (Full HD)	20 MP (HDR), Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
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
USB
Type-C, USB 2.0	Type-C, USB 2.0
Location
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
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(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 20(800 DD)	Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
4G (TDD)
Bands 38(2600), 40(2300), 41(2600+)	Bands 38(2600), 40(2300), 41(2600+)
3G
Bands 1(2100), 2(1900), 5(850), 8(900)	Bands 1(2100), 2(1900), 5(850), 8(900)
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

Buyers information

MSRP
€ 300
In The Box
	This is the official Samsu​ng Galaxy M21 User Guide in English provided from the manufacturer.

Availability

Officially announced
Mar 24, 2020	Mar 18, 2020

Alternative variants

with 128GB storage

RAM	6GB
Internal storage	128GB

with 128GB storage

RAM	6GB
Internal storage	128GB

Links

Full specifications
Samsung Galaxy A31 Specs	Samsung Galaxy M21 Specs