Samsung Galaxy M21 vs Xiaomi Mi 9 Specs Comparison

Availability

Officially announced
Mar 18, 2020	Feb 20, 2019

Design

Dimensions
6.26 x 2.96 x 0.35 inches 159.0 x 75.1 x 8.9 mm	6.20 x 2.94 x 0.30 inches 157.5 x 74.67 x 7.61 mm
Weight
6.63 oz / 188.0 g	6.10 oz / 173.0 g
Materials
Back: Plastic Frame: Plastic	Back: Glass (Corning Gorilla Glass 5) Frame: Metal
Biometrics
2D Face unlock, Fingerprint (touch)	Optical in-screen fingerprint
Keys
Right: Volume control, Lock/Unlock key
Colors
Midnight blue, Raven black	Black, Purple, Blue

Display

Size
6.4-inch, 84.11% screen-to-body	6.4-inch, 85.23% screen-to-body
Type
Super AMOLED, 420 nits	AMOLED, HDR, 600 nits
Resolution
2340x1080px, 19.5:9 ratio, 403 PPI	2340x1080px, 19.5:9 ratio, 403 PPI
Protection
Corning Gorilla Glass 3	Corning Gorilla Glass 6
Features
Scratch-resistant glass, Proximity sensor	HDR support, Oleophobic coating, Scratch-resistant glass, Ambient light sensor, Proximity sensor

PhoneArena Display Test

Bright Max (20% APL)
Untested	Untested
Bright Min
Untested	2 (Good)

Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
Exynos 9611 (10 nm)	Snapdragon 855 (7 nm)
Processor
Octa-core 4x2.3GHz Cortex-A73 4x1.7G​Hz Cortex-A53	Octa-core 2840 MHz Kryo 485
GPU
Mali-G72 MP3	Adreno 640
Memory
4GB (LPDDR4)/64GB 6GB/128GB	6GB (LPDDR4)/128GB 6GB/64GB 12GB/256GB
Storage expansion
microSDXC up to 512 GB	not expandable
OS
Android (11, 10)	Android (9.0 Pie)

Battery

Type
6000 mAh, Li - Polymer	3300 mAh
Charging
Fast charging	Qualcomm Quick Charge 4+ Qi wireless charging

Camera

Rear
Triple camera	Triple camera
Main camera
48 MP (PDAF) Aperture size: F2.0 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm	48 MP (Sapphire crystal lens cover, Laser and PDAF, CMOS image sensor) Aperture size: F1.8 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm
Second camera
8 MP (Ultra-wide) Aperture size: F2.2 Focal Length: 12 mm Sensor size: 1/4" Pixel size: 1.12 μm	12 MP (Telephoto, Sapphire crystal lens cover, PDAF) Optical zoom: 2.0x Aperture size: F2.2 Focal Length: 50 mm Sensor size: 1/3.4" Pixel size: 1 μm
Third camera
5 MP (Depth information) Aperture size: F2.2	16 MP (Ultra-wide, Sapphire crystal lens cover, PDAF) Aperture size: F2.2 Focal Length: 17 mm Sensor size: 1/3" Pixel size: 1 μm
Flash
LED	Dual LED
Video recording
4K UHD (30 fps), 1080p, 720p (240 fps) EIS	4K UHD (60 fps), 1080p (960 fps), 720p (960 fps) Continuous autofocus, EIS, Video calling, Video sharing
Front
20 MP (HDR) Video capture: 1080p	20 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	a,b,g,n,ac,dual-band MIMO, 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, 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, Galileo, BeiDou
Other
	NFC, Infrared, VoIP, Tethering, Computer sync, OTA sync

Multimedia

Headphones
3.5mm jack	No 3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Loudspeaker
Features
Dolby Atmos	aptX-HD
Screen mirroring
Wireless screen share	Wireless screen share
Radio
FM

Cellular

4G (FDD) Bands
1, 3, 5, 7, 8, 20	1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28
4G (TDD) Bands
38, 40, 41	38, 39, 40
3G Bands
1, 2, 5, 8	5, 8, 4, 2, 1
Data Speed
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s	LTE-A, HSPA, HSUPA
Dual SIM
Yes	Yes
SIM type
Nano SIM	Nano SIM
HD Voice
	Yes
VoLTE
	Yes

Phone Features

Notifications
	Haptic feedback, Music ringtones, Vibration
Other features
	Voice dialing, Voice commands, Voice recording

Alternative variants

with 128GB storage

Memory	6GB/128GB

with 64 GB storage

Memory	64GB

Explorer Edition

Memory	12GB/256GB

Discover more

Full Specs Samsung Galaxy M21 Specs

Full Specs Xiaomi Mi 9 Specs PA Review Xiaomi Mi 9 Review