Samsung Galaxy A31 vs Xiaomi Redmi 9 Specs Comparison

Availability

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

Design

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

Display

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

PhoneArena Display Test

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

Learn more on our PhoneArena Display Test Results page.

Hardware

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

Battery

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

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

Untested

Browsing

Untested

Video

9h 15min

Gaming

7h 3min

Learn more on our PhoneArena Battery Test Results page

Camera

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

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac	b,g,n Wi-Fi Direct, Hotspot 802.11 b, g, n
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, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
Other
NFC	NFC, Infrared

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	1, 2, 3, 4, 5, 7, 8, 20, 28
4G (TDD) Bands
38, 40, 41	38, 40, 41
3G Bands
1, 2, 5, 8	1, 2, 4, 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 128GB storage

Memory	6GB/128GB

with 64GB storage

Memory	4GB/64GB

Discover more

Full Specs Samsung Galaxy A31 Specs

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