OPPO A31 vs Xiaomi Redmi Note 9

Compare phone and tablet specifications of up to three devices at once.

Display

Size:

4.5 inches
6.5 inches

Resolution:

854 x 480 pixels, 218 PPI
2340 x 1080 pixels, 19.5:9 ratio, 395 PPI

Technology:

IPS LCD
IPS LCD

Screen-to-body:

64.59 %
83.52 %

Colors:

16 777 216

Touchscreen:

Capacitive, Multi-touch

Features:

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

Hardware

System chip:

Qualcomm Snapdragon 410 8916
MediaTek Helio G85

Processor:

Quad-core, ARM Cortex-A53, 64-bit
Octa-core, 2000 MHz, Arm Cortex-A75 and ArmCortex-A55, 64-bit, 12 nm

GPU:

Adreno 306
Mali G52 MC2

RAM:

1GB
3GB LPDDR4

Internal storage:

8GB
64GB (eMMC 5.1)

Storage expansion:

microSDXC up to 128 GB
microSDXC up to 128 GB

Device type:

Smartphone
Smartphone

OS:

Android
Android (10), Xiaomi MI UI

Battery

Capacity:

2000 mAh
5020 mAh

Type:

Li - Ion, User replaceable
Li - Polymer, Not user replaceable

Battery life test results:

Charging:

Fast charging, Reverse charging

Max charge speed:

Wired: 18.0W

Camera

Rear:

Single camera
Quad camera

Main camera:

8 MP (Autofocus)
48 MP (PDAF)

Specifications:

Aperture size: F2.2
Aperture size: F1.8; Sensor size: 1/2"; Pixel size: 0.8 μm

Second camera:

8 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.2 μm

Third camera:

2 MP (Macro, Autofocus)

Specifications:

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

Fourth camera:

2 MP

Specifications:

Aperture size: F2.4; Sensor size: 1/5"; Pixel size: 1.7 μm

Video recording:

1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps), 1280x720 (HD) (120 fps)

Features:

Video calling

Front:

5 MP
13 MP (HDR)

Video capture:

1920x1080 (Full HD)

Design

Dimensions:

5.19 x 2.58 x 0.32 inches (131.9 x 65.54 x 8.03 mm)
6.39 x 3.04 x 0.35 inches (162.3 x 77.2 x 8.9 mm)

Weight:

4.76 oz (135.0 g)
7.02 oz (199.0 g)

Materials:

Frame: Plastic

Resistance:

Splash

Biometrics:

Fingerprint (touch)

Features:

Touch sensitive control keys

Keys:

Left: Lock/Unlock key; Right: Volume control
Right: Volume control, Lock/Unlock key

Colors:

Blue, White
Forest green, Polar white, Midnight gray

Cellular

LTE (FDD):

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)

LTE (TDD):

Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)

UMTS:

Bands 2(1900), 1(2100)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)

Data Speed:

LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes
Yes

SIM type:

Nano SIM, Micro SIM
Nano SIM

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

Album art cover, Background playback

Screen mirroring:

Wireless screen share

Additional microphone(s):

for Noise cancellation

Connectivity & Features

Bluetooth:

4.0
5.0

Wi-Fi:

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

USB:

microUSB, USB 2.0
Type-C (reversible), USB 2.0

Features:

Mass storage device, Charging
Charging

Location:

GPS, A-GPS
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning

Sensors:

Accelerometer
Accelerometer, Gyroscope, Compass

Other:

Tethering, Computer sync, OTA sync
NFC, Infrared

Phone features

Notifications:

Haptic feedback, Music ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone

Other features:

Voice dialing, Voice commands, Voice recording

Buyers information

In The Box:

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

Availability

Officially announced:

Yes
Apr 30, 2020
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