Xiaomi Mi 9 vs Samsung Galaxy S21+ Specs Comparison

Availability

Officially announced
Feb 20, 2019	Jan 14, 2021
Prices (MSRP)
	8GB/128GB - $1000

Design

Dimensions
6.20 x 2.94 x 0.30 inches 157.5 x 74.67 x 7.61 mm	6.35 x 2.98 x 0.31 inches 161.5 x 75.6 x 7.8 mm
Weight
6.10 oz / 173.0 g	7.13 oz / 202.0 g
Materials
Back: Glass (Corning Gorilla Glass 5) Frame: Metal	Back: Glass (Corning Gorilla Glass Victus) Frame: Aluminum
Resistance
	Water, Dust; IP68
Biometrics
Optical in-screen fingerprint	2D Face unlock, Ultrasonic in-screen fingerprint
Keys
	Right: Volume control, Lock/Unlock key
Colors
Black, Purple, Blue	Phantom silver, Black, Violet

Display

Size
6.4-inch, 85.23% screen-to-body	6.7-inch, 88.63% screen-to-body
Type
AMOLED, HDR, 600 nits	Dynamic AMOLED, 120Hz, HDR, 1300 nits
Resolution
2340x1080px, 19.5:9 ratio, 403 PPI	2400x1080px, 20:9 ratio, 393 PPI
Protection
Corning Gorilla Glass 6	Corning Gorilla Glass Victus
Features
HDR support, Oleophobic coating, Scratch-resistant glass, Ambient light sensor, Proximity sensor

PhoneArena Display Test

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

Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
Snapdragon 855 (7 nm)	Snapdragon 888 (5 nm)
Processor
Octa-core 2840 MHz Kryo 485	Octa-core 1x2.84GHz Kryo 680 3x2.42GHz Kryo 680 4x1.80GHz Kryo 680
GPU
Adreno 640	Adreno 660
Memory
6GB (LPDDR4)/128GB 6GB/64GB 12GB/256GB	8GB (LPDDR5)/128GB (UFS 3.0) 8GB/256GB
Storage expansion
not expandable	not expandable
OS
Android (9.0 Pie)	Android (13, 12, 11)

Battery

Type
3300 mAh	4800 mAh, Li - Polymer
Charging
Qualcomm Quick Charge 4+ Qi wireless charging	Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging Qi and Powermat wireless charging, Reverse wireless charging
Charge speed
	Wired: 25.0W Wireless: 15.0W

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

5h 26min

Browsing

10h 50min

Video

8h 27min

Gaming

8h 36min

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Triple camera	Triple camera
Main camera
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	12 MP (OIS, PDAF) Aperture size: F1.8 Focal length: 26 mm Sensor size: 1/1.76" Pixel size: 1.8 μm
Second camera
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	12 MP (Ultra-wide, PDAF) Aperture size: F1.8 Focal Length: 13 mm Sensor size: 1/2.55" Pixel size: 1.4 μm
Third camera
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	64 MP (Telephoto, OIS, PDAF) Aperture size: F2.0 Focal Length: 29 mm Sensor size: 1/2.55" Pixel size: 0.8 μm
Flash
Dual LED	LED
Video recording
4K UHD (60 fps), 1080p (960 fps), 720p (960 fps) Continuous autofocus, EIS, Video calling, Video sharing	8K UHD (24 fps), 4K UHD (60 fps), 1080p (240 fps), 720p (960 fps) OIS, HDR, Hyperlapse, Video light, EIS
Front
20 MP (HDR) Video capture: 1080p	10 MP (PDAF, HDR) Video capture: 4K UHD (60 fps)

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
a,b,g,n,ac,dual-band MIMO, Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac	a,b,g,n,ac,Wi-Fi 6,dual-band MIMO, Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac, ax
USB
Type-C, USB 2.0	Type-C, USB 3.2
Sensors
Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor	Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer, Ambient light sensor, Proximity sensor
Hearing aid compatible
	M3/T3
Location
GPS, A-GPS, Glonass, Galileo, BeiDou	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Other
NFC, Infrared, VoIP, Tethering, Computer sync, OTA sync	NFC, ANT+

Multimedia

Headphones
No 3.5mm jack	No 3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Multiple speakers
Features
aptX-HD	32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus
Screen mirroring
Wireless screen share

Cellular

5G Bands
	n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave
4G (FDD) Bands
1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28	1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71
4G (TDD) Bands
38, 39, 40	38, 39, 40, 41, 46, 48
3G Bands
5, 8, 4, 2, 1	1, 2, 4, 5, 8
Data Speed
LTE-A, HSPA, HSUPA	LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
Dual SIM
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

Regulatory Approval

FCC approval
	Date approved: Dec 18, 2020 FCC ID value: A3LSMG996U
Measured SAR
	Head: 0.65 W/kg Body: 0.95 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 1.04 W/kg Phablet: 3.97 W/kg

Alternative variants

with 64 GB storage

Memory	64GB

with 256GB storage

Memory	256GB
Prices (MSRP)	$1050

Explorer Edition

Memory	12GB/256GB

for Europe

System chip	Samsung Exynos 2100 (5 nm)
Processor	Octa-core 1x2.91GHz Cortex-X1 3x2.81G​Hz Cortex-A78 4x2.2G​Hz Cortex-A55
GPU	Mali G78 MP14
Weight	7.05 oz / 200.0 g
5G Bands	SA, NSA, Sub-6
FCC approval	Date approved: Dec 18, 2020 FCC ID value: A3LSMG996B
Measured SAR	Head: 0.24 W/kg Body: 0.75 W/kg Simultaneous Transmission: 3.59 W/kg Wireless Router: 1.26 W/kg Phablet: 1.95 W/kg

Discover more

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

Full Specs Samsung Galaxy S21+ Specs PA Review Samsung Galaxy S21+ Review