Samsung Galaxy M31s 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 specs comparison tool or pick a popular device from the ones below.
Display
Size
Resolution
Technology
Super AMOLED
Super AMOLED
Screen-to-body
86.62 %
84.11 %
Peak brightness
420 cd/m2 (nit)
Features
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Proximity sensor
Hardware
System chip
Samsung Exynos 9611
Exynos 9611
Processor
GPU
Mali-G72 MP3
Mali-G72 MP3
RAM
Internal storage
128GB, available to use: 106.4 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 (10), Samsung One UI
Battery
Capacity
6000 mAh
6000 mAh
Type
Not user replaceable
Li - Polymer, Not user replaceable
Charging
Fast charging, Reverse charging
Fast charging
Max charge speed
Wired: 25.0W
Camera
Rear
Quad camera
Triple camera
Main camera
Specifications
Aperture size: F1.8; Pixel size: 0.8 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Second camera
12 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: F2.2
Fourth camera
5 MP (Depth information)
Video recording
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (480 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
Features
Hyperlapse
EIS
Front
32 MP
20 MP (HDR)
Design
Dimensions
Weight
the average is 6.2 oz (176 g)
the average is 6.2 oz (176 g)
Materials
Back: Plastic; Frame: Plastic
Biometrics
Fingerprint (touch)
2D Face unlock, Fingerprint (touch)
Colors
Mirage black, Mirage blue
Midnight blue, Raven black
Cellular
LTE (FDD)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 17(700 b), 20(800 DD), 26(850+), 28(700 APT), 66(AWS-3)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
LTE (TDD)
Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)
UMTS
850, 900, 1700/2100, 1900, 2100 MHz
850, 900, 1900, 2100 MHz
Data Speed
Dual SIM
Yes
Yes
SIM type
Nano SIM
Nano SIM
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
Connectivity & Features
Bluetooth
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, dual-band; Wi-Fi Direct, Hotspot
USB
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0
Features
Charging, OTG
Charging
Location
GPS, A-GPS, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope
