Xiaomi Redmi 9 vs Samsung Galaxy A21s Specs Comparison

Design

Dimensions
6.43 x 3.03 x 0.36 inches 163.32 x 77.01 x 9.1 mm	6.44 x 2.96 x 0.35 inches 163.7 x 75.3 x 8.9 mm
Weight
6.98 oz (198.0 g)	6.77 oz (192.0 g)
Biometrics
2D Face unlock, Fingerprint (touch)	2D Face unlock, Fingerprint (touch)
Keys
Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Carbon gray, Sunset purple, Ocean green	Black, White, Blue, Red

Display

Size
6.5-inch	6.5-inch
Resolution
2340x1080px, 19.5:9 ratio, 395 PPI	1600x720px, 20:9 ratio, 270 PPI
Technology
IPS LCD	TFT
Screen-to-body
83.27 %	82.94 %
Features
Oleophobic coating, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor	Proximity sensor

Hardware

System chip
MediaTek Helio G80 (12 nm)	Samsung Exynos 850
Processor
Octa-core 2000 MHz Arm Cortex-A75 and Arm Cortex-A55	Octa-core 8x 2.0GHz Cortex-A55
GPU
Mali G52 MC2	Mali-G76
RAM
3GB (LPDDR4)	3GB (LPDDR4)
Internal storage
32GB (eMMC 5.1)	32GB (eMMC 5.1), available to use: 19.5 GB
Storage expansion
microSDXC	microSDXC up to 512 GB
OS
Android	Android (10), Samsung One UI

Battery

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

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

9h 15min

Gaming

7h 3min

Battery Life Estimate

Untested

Browsing

Untested

Video

11h 9min

Gaming

7h 48min

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	2 MP (Macro) Aperture size: F2.4
Fourth camera
2 MP (Depth information)	2 MP (Depth information) Aperture size: F2.4
Flash
LED	LED
Video recording
1920x1080 (Full HD)	1920x1080 (Full HD) (30 fps)
Front
8 MP (HDR), Video capture: 1920x1080 (Full HD)	13 MP, Video capture: 1920x1080 (Full HD)

Connectivity & Features

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

Cellular

4G (FDD)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)	Bands 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)
4G (TDD)
Bands 38(2600), 40(2300), 41(2600+)	Bands 38(2600), 40(2300), 41(2600+)
3G
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)	Bands 1(2100), 2(1900), 5(850), 8(900)
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

Buyers information

MSRP
	€ 240
In The Box
10W Charger, TPU case, USB Type-C cable, SIM eject tool, Warranty card, User guide

Availability

Officially announced
	May 15, 2020

Alternative variants

with 64GB storage

RAM	4GB
Internal storage	64GB

with 4GB RAM

RAM	4GB
Internal storage	64GB

with 6GB RAM

RAM	6GB
Internal storage	64GB

Links

Full specifications
Xiaomi Redmi 9 Specs	Samsung Galaxy A21s Specs
PhoneArena Review
Xiaomi Redmi 9 Review	Samsung Galaxy A21s Review
User Reviews
Xiaomi Redmi 9 User Reviews