Samsung Galaxy M31s vs Samsung Galaxy M21 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 M31s
Samsung Galaxy M21
Samsung Galaxy M31s Samsung Galaxy M21
Released · Aug 06, 2020
Released · Mar 23, 2020
6.5-inch · 2400x1080px
6.4-inch · 2340x1080px
Quad camera
Triple camera
6GB · 128GB
4GB · 64GB
6000 mAh
6000 mAh

Availability

Officially announced
Jul 30, 2020 Mar 18, 2020
Prices (MSRP)
€310

Design

Dimensions
6.27 x 2.93 x 0.37 inches
159.3 x 74.4 x 9.3 mm 		6.26 x 2.96 x 0.35 inches
159.0 x 75.1 x 8.9 mm
Weight
7.16 oz / 203.0 g 6.63 oz / 188.0 g
Materials
Back: Plastic
Frame: Plastic
Biometrics
Fingerprint (touch) 2D Face unlock, Fingerprint (touch)
Keys
Right: Volume control, Lock/Unlock key Right: Volume control, Lock/Unlock key
Colors
Mirage black, Mirage blue Midnight blue, Raven black

Display

Size
6.5-inch, 86.06% screen-to-body 6.4-inch, 84.11% screen-to-body
Type
Super AMOLED Super AMOLED, 420 nits
Resolution
2400x1080px, 20:9 ratio, 405 PPI 2340x1080px, 19.5:9 ratio, 403 PPI
Protection
Corning Gorilla Glass 3 Corning Gorilla Glass 3
Features
Scratch-resistant glass, Proximity sensor

Hardware

System chip
Samsung Exynos 9611 (10 nm) Exynos 9611 (10 nm)
Processor
Octa-core
4x2.3GHz Cortex-A73
4x1.7G​Hz Cortex-A53 		Octa-core
4x2.3GHz Cortex-A73
4x1.7G​Hz Cortex-A53
GPU
Mali-G72 MP3 Mali-G72 MP3
Memory
6GB (LPDDR4)/128GB (UFS 2.1)
8GB/128GB 		4GB (LPDDR4)/64GB
6GB/128GB
Storage expansion
microSDXC up to 512 GB microSDXC up to 512 GB
OS
Android (11, 10) Android (11, 10)

Battery

Type
6000 mAh 6000 mAh, Li - Polymer
Charging
Fast charging
Reverse wired charging 		Fast charging
Charge speed
Wired: 25.0W

Camera

Rear
Quad camera Triple camera
Main camera
64 MP (PDAF)
Aperture size: F1.8
Focal length: 26 mm
Sensor size: 1/1.7"
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
12 MP (Ultra-wide)
Aperture size: F2.2 		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
4K UHD (30 fps), 1080p (120 fps), 720p (480 fps)
Hyperlapse, EIS 		4K UHD (30 fps), 1080p, 720p (240 fps)
EIS
Front
32 MP
Video capture: 4K UHD (30 fps) 		20 MP (HDR)
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, Compass, Ambient light sensor, Proximity sensor Accelerometer, Gyroscope, Proximity sensor
Location
GPS, A-GPS, 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 FM

Cellular

4G (FDD) Bands
1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 26, 28, 66 1, 3, 5, 7, 8, 20
4G (TDD) Bands
38, 40, 41 38, 40, 41
3G Bands
1, 2, 4, 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

Alternative variants

with 8GB RAM
Memory 8GB
with 128GB storage
Memory 6GB/128GB
FCC OKs Cingular\'s purchase of AT&T Wireless