Samsung Galaxy A31 vs Samsung Galaxy M21
Compare phone and tablet specifications of up to three devices. Type a model name in the search field of our phone comparison tool or pick a popular device from the ones below.
Display
Size
Resolution
Technology
Super AMOLED
Super AMOLED
Screen-to-body
84.88 %
84.11 %
Features
Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Proximity sensor
Hardware & Performance
System chip
MediaTek Helio P65 MT6768
Exynos 9611
Processor
GPU
Mali-G52 MC2
Mali-G72 MP3
RAM
Internal storage
64GB
64GB
Storage expansion
microSDXC up to 512 GB
microSDXC up to 512 GB
OS
Android (10), Samsung One UI
Android (10), Samsung One UI
Battery
Capacity
5000 mAh
6000 mAh
Type
Not user replaceable
Li - Polymer, Not user replaceable
Charging
Fast charging
Fast charging
Camera
Rear
Quad camera
Triple camera
Main camera
Specifications
Aperture size: F2.0; Pixel size: 0.8 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Second camera
8 MP (Ultra-wide)
8 MP (Ultra-wide)
Specifications
Aperture size: F2.2
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Third camera
5 MP (Macro)
5 MP (Depth information)
Specifications
Aperture size: F2.4
Aperture size: F2.2
Fourth camera
5 MP (Depth information)
Specifications
Aperture size: F2.4
Video recording
1920x1080 (Full HD)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
Features
EIS
Front
20 MP
20 MP (HDR)
Design
Dimensions
Weight
the average is 6.4 oz (184 g)
the average is 6.4 oz (184 g)
Materials
Back: Plastic
Back: Plastic; Frame: Plastic
Biometrics
In-screen fingerprint
2D Face unlock, Fingerprint (touch)
Colors
Prism Crush black, Prism Crush blue, Prism Crush red, Prism Crush white
Midnight blue, Raven black
Cellular
LTE (FDD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
LTE (TDD)
Bands 38(2600), 40(2300), 41(2600+)
UMTS
850, 900, 1900, 2100 MHz
Data Speed
Dual SIM
Yes
Yes
SIM type
Nano SIM
Nano SIM
Multimedia
Headphones
3.5mm jack
Features
Dolby Atmos
Connectivity & Features
Bluetooth
Yes
5.0
Wi-Fi
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 (reversible)
Type-C (reversible), USB 2.0
Features
Charging
Charging
Sensors
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope
