Xiaomi Mi A2 vs Xiaomi Mi 9

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Display

Display size

6.0 inches
6.4 inches

Resolution

1080 x 2160 pixels
1080 x 2340 pixels

Pixel density

403 ppi
403 ppi

Technology

IPS LCD
AMOLED

Screen-to-body ratio

77.32 %
85.23 %

Peak brightness

 
600 cd/m2 (nit)

Features

Scratch-resistant glass (Corning Gorilla Glass 5), ShatterShield, Ambient light sensor, Proximity sensor
HDR video support, Oleophobic coating, Scratch-resistant glass (Corning Gorilla Glass 6), Ambient light sensor, Proximity sensor

Camera

Rear

Dual camera
Triple camera

Main camera

12 megapixels
48 megapixels

Hardware Features

Phase detection autofocus
Sapphire crystal lens cover, Laser and Phase detection autofocus, CMOS image sensor

Specifications

Aperture size: F1.8; Sensor size: 1/2.9"; Pixel size: 1.25 μm
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm

Second camera

20 megapixels
12 megapixels

Hardware Features

 
Telephoto, Sapphire crystal lens cover, Phase detection autofocus

Specifications

Aperture size: F1.8; Sensor size: 1/2.8"; Pixel size: 1 μm
Optical zoom: 2x; Aperture size: F2.2; Focal Length: 50 mm; Sensor size: 1/3.4"; Pixel size: 1 μm

Third camera

 
16 megapixels

Hardware Features

 
Ultra-wide, Sapphire crystal lens cover, Phase detection autofocus

Specifications

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

Flash

LED
Dual LED

Video recording

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (30 fps), 1280x720 (HD) (120 fps)
3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (960 fps), 1280x720 (HD) (960 fps)

Features

Video calling, Video sharing
Continuous autofocus, Digital image stabilization, Video calling, Video sharing

Front

20 megapixels
20 megapixels

Features

Flash, High Dynamic Range mode (HDR)
High Dynamic Range mode (HDR)

Design

Dimensions

6.25 x 2.97 x 0.29 inches (158.7 x 75.4 x 7.3 mm)
6.20 x 2.94 x 0.30 inches (157.5 x 74.67 x 7.61 mm)

Weight

5.93 oz (168 g)
the average is 6 oz (172 g)
6.10 oz (173 g)
the average is 6 oz (172 g)

Materials

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

Biometrics

Fingerprint (touch)
In-screen fingerprint

Colors

Black, Gold, Pink, Blue, Red
Black, Purple, Blue

Hardware & Performance

System chip

Qualcomm Snapdragon 660 SDM660
Qualcomm Snapdragon 855

Processor

Octa-core, 2200 MHz, Kryo 260, 64-bit, 14 nm
Octa-core, 2840 MHz, Kryo 485, 64-bit, 7 nm

GPU

Adreno 512
Adreno 640

RAM

6 GB
6 GB

Internal storage

128 GB
128 GB

OS

Android (8.1 Oreo)
Android (9.0 Pie), Xiaomi MI UI

Battery

Capacity

3010 mAh
3300 mAh

Charging

Qualcomm Quick Charge 3.0
Qualcomm Quick Charge 4+, Qi wireless charging

Cellular

LTE (FDD)

Bands 1, 2, 3, 4, 5, 7, 8, 20
Bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28

LTE (TDD)

Bands 38, 40
Bands 38, 39, 40

UMTS

850, 900, 1800, 1900 MHz
850, 900, 1700/2100, 1900, 2100 MHz

GSM

850, 900, 1800, 1900 MHz
850, 900, 1800, 1900 MHz

CDMA

 
800 MHz

Data

LTE-A, HSPA, HSUPA
LTE-A, HSPA, HSUPA

Dual SIM

Yes
Yes

SIM type

Nano SIM
Nano SIM

HD Voice

 
Yes

VoLTE

 
Yes

Connectivity

Bluetooth

5.0
5.0

Wi-Fi

802.11 a, b, g, n, ac, dual-band
802.11 a, b, g, n, ac, dual-band

USB

USB 2.0
USB 2.0

Connector

USB Type-C (reversible)
USB Type-C (reversible)

Features

Mass storage device
Mass storage device, USB OTG

Location

GPS, A-GPS, Glonass, BeiDou
GPS, A-GPS, Glonass, Galileo, BeiDou

Other

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

Phone features

Sensors

Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass

Notifications

Haptic feedback, Music ringtones, Vibration
Haptic feedback, Music ringtones, Vibration

Other features

Voice dialing, Voice commands, Voice recording
Voice dialing, Voice commands, Voice recording

Multimedia

Screen mirroring

Wireless screen share
Wireless screen share

Radio

FM
 

Speakers

Earpiece, Loudspeaker
Earpiece, Loudspeaker

Headphones connector

USB Type-C (reversible)
USB Type-C (reversible)

Additional microphone(s)

for Noise cancellation
 

Shopping information

In The Box

Power adapter, USB cable, SIM eject too, Type-C to Audio adapter, User guide, Clear soft case
Case, 18W Charger, USB Type-C cable, Type-c to 3.5 mm adapter, SIM removal tool, Documentation
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