Samsung Galaxy M31 vs Samsung Galaxy A21s

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Display

Size

6.4 inches
6.5 inches

Resolution

2340 x 1080 pixels, 19.5:9 ratio,
403 PPI
1600 x 720 pixels, 20:9 ratio,
270 PPI

Technology

Super AMOLED
AMOLED

Screen-to-body

83.97 %
82.94 %

Features

Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor

Hardware & Performance

System chip

Exynos 9611
Samsung Exynos 850

Processor

Octa-core, 2300 MHz, Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm
Octa-core, 2000 MHz, Arm Cortex-A55, 64-bit

GPU

Mali-G72 MP3
Mali-G76

RAM

6GB LPDDR4
3GB LPDDR4

Internal storage

64GB
32GB (eMMC 5.1)

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
5000 mAh

Type

Not user replaceable
Li - Polymer, Not user replaceable

Charging

 
Fast charging

Camera

Rear

Quad camera
Quad camera

Main camera

64 MP (PDAF)
48 MP (PDAF)

Specifications

Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.7"; 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; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm

Third camera

5 MP (Macro)
2 MP (Macro)

Specifications

Aperture size: F2.2; Focal Length: 25 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.4

Fourth camera

5 MP (Depth information)
2 MP (Depth information)

Specifications

Aperture size: F2.2
Aperture size: F2.4

Video recording

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
1920x1080 (Full HD)

Features

Hyperlapse, EIS
 

Front

32 MP (HDR, Slow-motion videos)
13 MP

Design

Dimensions

6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)
6.44 x 2.96 x 0.35 inches (163.7 x 75.3 x 8.9 mm)

Weight

6.74 oz (191 g)
the average is 6.5 oz (184 g)
6.77 oz (192 g)
the average is 6.5 oz (184 g)

Materials

Back: Plastic; Frame: Plastic
 

Biometrics

2D Face unlock, Fingerprint (touch)
2D Face unlock, Fingerprint (touch)

Colors

Ocean blue, Space black
Black, White, Blue, Red

Cellular

LTE (FDD)

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 20(800 DD), 26(850+), 28(700 APT), 66(AWS-3)
 

LTE (TDD)

Bands 38(2600), 40(2300), 41(2600+)
 

UMTS

850, 900, 1700/2100, 1900, 2100 MHz
 

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

VoLTE

Yes
 

Multimedia

Headphones

3.5mm jack
3.5mm jack

Features

Dolby Atmos
 

Connectivity & Features

Bluetooth

5.0
5.0

Wi-Fi

802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 b, g, n; Wi-Fi Direct, Hotspot

USB

Type-C (reversible), USB 2.0
Yes

Features

Charging
 

Sensors

Accelerometer, Gyroscope, Compass
Accelerometer

Shopping information

In The Box

15W fast charger, Data cable, Ejection pin, User Manual
 
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