Samsung Galaxy A31 vs Samsung Galaxy A21s

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Display

Size

6.4 inches
6.5 inches

Resolution

2400 x 1080 pixels, 20:9 ratio,
411 PPI
1600 x 720 pixels, 20:9 ratio,
270 PPI

Technology

Super AMOLED
AMOLED

Screen-to-body

84.88 %
82.94 %

Features

Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor

Hardware & Performance

System chip

MediaTek Helio P65 MT6768
Samsung Exynos 850

Processor

Octa-core, 2000 MHz, Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm
Octa-core, 2000 MHz, Arm Cortex-A55, 64-bit

GPU

Mali-G52 MC2
Mali-G76

RAM

4GB 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

5000 mAh
5000 mAh

Type

Not user replaceable
Li - Polymer, Not user replaceable

Charging

Fast charging
Fast charging

Camera

Rear

Quad camera
Quad camera

Main camera

48 MP (PDAF)
48 MP (PDAF)

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; Sensor size: 1/4"; Pixel size: 1.12 μm

Third camera

5 MP (Macro)
2 MP (Macro)

Specifications

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

Fourth camera

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

Specifications

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

Video recording

1920x1080 (Full HD)
1920x1080 (Full HD)

Front

20 MP
13 MP

Design

Dimensions

6.27 x 2.88 x 0.34 inches (159.3 x 73.1 x 8.6 mm)
6.44 x 2.96 x 0.35 inches (163.7 x 75.3 x 8.9 mm)

Weight

6.53 oz (185 g)
the average is 6.4 oz (184 g)
6.77 oz (192 g)
the average is 6.4 oz (184 g)

Materials

Back: Plastic
 

Biometrics

In-screen fingerprint
2D Face unlock, Fingerprint (touch)

Colors

Prism Crush black, Prism Crush blue, Prism Crush red, Prism Crush white
Black, White, Blue, Red

Cellular

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

Multimedia

Headphones

 
3.5mm jack

Connectivity & Features

Bluetooth

Yes
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)
Yes

Features

Charging
 

Sensors

Accelerometer, Gyroscope, Compass
Accelerometer
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