Samsung Galaxy A31 vs Xiaomi Redmi Note 9S

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$250 VIEW ON AMAZON
$260 VIEW ON AMAZON

Display

Size

6.4 inches
6.7 inches

Resolution

2400 x 1080 pixels, 20:9 ratio,
411 PPI
2400 x 1080 pixels, 20:9 ratio,
395 PPI

Technology

Super AMOLED
IPS LCD

Screen-to-body

84.88 %
84.42 %

Features

Ambient light sensor, Proximity sensor
HDR video support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor

Hardware & Performance

System chip

MediaTek Helio P65 MT6768
Qualcomm Snapdragon 720G SM7125

Processor

Octa-core, 2000 MHz, Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm
Octa-core, 2300 MHz, Kryo 465, 64-bit, 8 nm

GPU

Mali-G52 MC2
Adreno 618

RAM

4GB LPDDR4
4GB LPDDR4

Internal storage

64GB
64GB

Storage expansion

microSDXC up to 512 GB
microSDXC up to 512 GB

OS

Android (10), Samsung One UI
Android (10)

Battery

Capacity

5000 mAh
5020 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: F1.8; 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; Pixel size: 1.12 μm

Third camera

5 MP (Macro)
5 MP (Macro, Autofocus)

Specifications

Aperture size: F2.4
Aperture size: F2.4; Pixel size: 1.12 μm

Fourth camera

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

Specifications

Aperture size: F2.4
Aperture size: F2.4; Pixel size: 1.75 μm

Video recording

1920x1080 (Full HD)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (960 fps)

Front

20 MP
16 MP (HDR, Slow-motion videos)

Design

Dimensions

6.27 x 2.88 x 0.34 inches (159.3 x 73.1 x 8.6 mm)
6.53 x 3.02 x 0.35 inches (165.75 x 76.68 x 8.8 mm)

Weight

6.53 oz (185 g)
the average is 6.4 oz (184 g)
7.37 oz (209 g)
the average is 6.4 oz (184 g)

Materials

Back: Plastic
Back: Glass (Corning Gorilla Glass 5)

Biometrics

In-screen fingerprint
Fingerprint (touch)

Colors

Prism Crush black, Prism Crush blue, Prism Crush red, Prism Crush white
Interstellar grey, Aurora blue, Glacier white

Cellular

LTE (TDD)

 
Bands 38(2600), 40(2300)

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

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)

Features

Charging
Charging

Sensors

Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass

Other

 
Infrared

Shopping information

In The Box

 
22.5W Wire charger, Simple protective cover, USB Type-C cable, SIM eject tool, User guide, Warranty card

MSRP

 
$ 249
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