Xiaomi Redmi 9 vs Samsung Galaxy A31 Specs Comparison

Availability

Officially announced
	Mar 24, 2020
Prices (MSRP)
	€300

Design

Dimensions
6.43 x 3.03 x 0.36 inches 163.32 x 77.01 x 9.1 mm	6.27 x 2.88 x 0.34 inches 159.3 x 73.1 x 8.6 mm
Weight
6.98 oz / 198.0 g	6.53 oz / 185.0 g
Materials
	Back: Plastic
Biometrics
2D Face unlock, Fingerprint (touch)	Optical in-screen fingerprint
Keys
Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Carbon gray, Sunset purple, Ocean green	Prism Crush black, Prism Crush blue, Prism Crush red, Prism Crush white

Display

Size
6.5-inch, 83.27% screen-to-body	6.4-inch, 84.88% screen-to-body
Type
IPS LCD	Super AMOLED, 60Hz
Resolution
2340x1080px, 19.5:9 ratio, 395 PPI	2400x1080px, 20:9 ratio, 411 PPI
Protection
Corning Gorilla Glass 3
Features
Oleophobic coating

PhoneArena Display Test

Bright Max (20% APL)
Untested	Untested
Bright Min
1.5 (Good)	Untested

Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
MediaTek Helio G80 (12 nm)	MediaTek Helio P65 MT6768 (12 nm)
Processor
Octa-core 2000 MHz Arm Cortex-A75 and Arm Cortex-A55	Octa-core 2x2.0GHz Cortex-A75 6x2.0G​Hz Cortex-A55
GPU
Mali G52 MC2	Mali-G52 MC2
Memory
3GB (LPDDR4)/32GB (eMMC 5.1) 4GB/64GB	4GB (LPDDR4)/64GB (eMMC 5.1) 6GB/128GB
Storage expansion
microSDXC	microSDXC up to 512 GB
OS
Android	Android (10)

Battery

Type
5020 mAh	5000 mAh, Li - Polymer
Charging
Qualcomm Quick Charge 3.0	Fast charging
Charge speed
Wired: 18.0W	Wired: 15.0W

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

9h 15min

Gaming

7h 3min

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Quad camera	Quad camera
Main camera
13 MP (PDAF) Aperture size: F2.2	48 MP (PDAF) Aperture size: F2.0 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm
Second camera
8 MP (Ultra-wide) Aperture size: F2.2	8 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/4" Pixel size: 1.12 μm
Third camera
5 MP (Macro) Aperture size: F2.4	5 MP (Macro) Aperture size: F2.4
Fourth camera
2 MP (Depth information)	5 MP (Depth information) Aperture size: F2.4
Flash
LED	LED
Video recording
1080p	1080p (30 fps)
Front
8 MP (HDR) Video capture: 1080p	20 MP Video capture: 1080p

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
b,g,n Wi-Fi Direct, Hotspot 802.11 b, g, n	a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac
USB
Type-C, USB 2.0	Type-C, USB 2.0
Sensors
Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor	Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor
Location
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Other
NFC, Infrared	NFC

Multimedia

Headphones
3.5mm jack	3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Loudspeaker
Screen mirroring
Wireless screen share	Wireless screen share
Radio
FM
Additional microphone(s)
Noise cancellation	Noise cancellation

Cellular

4G (FDD) Bands
1, 2, 3, 4, 5, 7, 8, 20, 28	1, 2, 3, 4, 5, 7, 8, 20
4G (TDD) Bands
38, 40, 41	38, 40, 41
3G Bands
1, 2, 4, 5, 8	1, 2, 5, 8
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
HD Voice
Yes
VoLTE
Yes

Regulatory Approval

FCC approval
	Date approved: Mar 08, 2020 FCC ID value: A3LSMA315GL
Measured SAR
	Head: 0.53 W/kg Body: 0.56 W/kg Simultaneous Transmission: 1.42 W/kg Wireless Router: 0.65 W/kg Phablet: 0.89 W/kg

Alternative variants

with 64GB storage

Memory	4GB/64GB

with 128GB storage

Memory	6GB/128GB

Discover more

Full Specs Xiaomi Redmi 9 Specs PA Review Xiaomi Redmi 9 Review

Full Specs Samsung Galaxy A31 Specs