Xiaomi Mi 9 vs OnePlus 7

$259 VIEW ON AMAZON
$600 VIEW ON AMAZON

Display

Size

6.4 inches
6.4 inches

Resolution

2340 x 1080 pixels, 19.5:9 ratio,
403 PPI
2340 x 1080 pixels, 19.5:9 ratio,
402 PPI

Technology

AMOLED
AMOLED

Screen-to-body

85.23 %
85.63 %

Features

HDR video support, Oleophobic coating, Scratch-resistant glass (Corning Gorilla Glass 6), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 6), Ambient light sensor, Proximity sensor

Hardware & Performance

System chip

Qualcomm Snapdragon 855
Qualcomm Snapdragon 855

Processor

Octa-core, 2840 MHz, Kryo 485, 64-bit, 7 nm
Octa-core, 2840 MHz, Kryo 485, 64-bit, 7 nm

GPU

Adreno 640
Adreno 640

RAM

6GB
6GB

Internal storage

128GB, not expandable
128GB, not expandable

OS

Android (9.0 Pie), Xiaomi MI UI
Android (10, 9.0 Pie), OxygenOS UI

Battery

Capacity

3300 mAh
3700 mAh

Type

Not user replaceable
Not user replaceable

Charging

Qualcomm Quick Charge 4+, Qi wireless charging
Fast charging

Camera

Rear

Triple camera
Dual camera

Main camera

48 MP (Sapphire crystal lens cover, Laser and PDAF, CMOS image sensor)
48 MP (OIS, PDAF)

Specifications

Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.7; Sensor size: 1/2"; Pixel size: 0.8 μm

Second camera

12 MP (Telephoto, Sapphire crystal lens cover, PDAF)
5 MP (Depth information)

Specifications

Optical zoom: 2x; Aperture size: F2.2; Focal Length: 50 mm; Sensor size: 1/3.4"; Pixel size: 1 μm
Aperture size: F2.4; Pixel size: 1.12 μm

Third camera

16 MP (Ultra-wide, Sapphire crystal lens cover, PDAF)
 

Specifications

Aperture size: F2.2; Focal Length: 17 mm; Sensor size: 1/3"; Pixel size: 1 μm
 

Video recording

3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (960 fps), 1280x720 (HD) (960 fps)
3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (480 fps)

Features

Continuous autofocus, EIS, Video calling, Video sharing
Time-lapse video, EIS, Video calling, Video sharing

Front

20 MP (HDR)
16 MP (HDR)

Design

Dimensions

6.20 x 2.94 x 0.30 inches (157.5 x 74.67 x 7.61 mm)
6.21 x 2.94 x 0.32 inches (157.7 x 74.8 x 8.2 mm)

Weight

6.10 oz (173 g)
the average is 6.4 oz (183 g)
6.42 oz (182 g)
the average is 6.4 oz (183 g)

Materials

Back: Glass (Corning Gorilla Glass 5); Frame: Metal
Back: Glass (Corning Gorilla Glass 5); Frame: Metal

Biometrics

In-screen fingerprint
2D Face unlock, In-screen fingerprint

Colors

Black, Purple, Blue
Mirror gray

Cellular

LTE (FDD)

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 17(700 b), 20(800 DD), 28(700 APT)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 18(800 Lower), 19(800 Upper), 20(800 DD), 26(850+), 28(700 APT), 29(700 d), 32(1500 L-band)

LTE (TDD)

Bands 38(2600), 39(1900+), 40(2300)
Bands 34(2000), 38(2600), 39(1900+), 40(2300), 41(2600+)

UMTS

850, 900, 1700/2100, 1900, 2100 MHz
800, 850, 900, 1700/2100, 1900, 2100 MHz

Data Speed

LTE-A, HSPA, HSUPA
LTE-A Pro Cat 16 (1000/150 Mbit/s), 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
 

Multimedia

Headphones

No 3.5mm jack
No 3.5mm jack

Features

aptX-HD
Dolby Atmos, aptX-HD

Connectivity & Features

Bluetooth

5.0
5.0

Wi-Fi

802.11 a, b, g, n, ac, dual-band; MIMO, Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; MIMO, Wi-Fi Direct, Hotspot

USB

Type-C (reversible), USB 2.0
Type-C (reversible), USB 3.1

Features

Mass storage device, OTG, Charging, Headphones port
Mass storage device, Charging, Headphones port

Sensors

Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass

Other

NFC, Infrared, VoIP, Tethering, Computer sync, OTA sync
NFC, VoIP, Tethering, Computer sync, OTA sync

Phone features

Notifications

Haptic feedback, Music ringtones, Vibration
 

Other features

Voice dialing, Voice commands, Voice recording
 

Shopping information

In The Box

Case, 18W Charger, USB Type-C cable, Type-c to 3.5 mm adapter, SIM removal tool, Documentation
Power Adapter, Type-C Cable (Support USB 2.0), Quick Start Guide, Welcome Letter, Safety Information, Warranty Card, LOGO Sticker, Case, Screen Protector (pre-applied), SIM Tray Ejector
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