Xiaomi Mi 4 specs

Display Benchmarks
Size	5.0-inch
Resolution	1920 x 1080 px, 441 PPI
Technology	IPS LCD
Screen-to-body	72.20 %
Features	Ambient light sensor, Proximity sensor

Hardware
System chip	Qualcomm Snapdragon 801 8974-AC (28 nm)
Processor	Quad-core, 2500 MHz, Krait 400, 32-bit
GPU	Adreno 330
RAM	3GB (LPDDR3)
Internal storage	64GB
OS	Android (6.0 Marshmallow, 4.4.3), Xiaomi MI UI
Device type	Smartphone
This device has different variants: View all

Battery
Capacity	3080 mAh
Type	Li - Polymer, Not user replaceable
Charging	Qualcomm Quick Charge 2.0

Camera
Rear	Single camera
Main camera	13 MP (Autofocus, CMOS image sensor) Specifications: Aperture size: F1.8 Sensor size: 1/3.06"
Flash	LED
Video recording	3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (60 fps) Features: HDR
Front	8 MP

Design
Dimensions	5.48 x 2.70 x 0.35 inches (139.2 x 68.5 x 8.9 mm)
Weight	5.26 oz(149.0 g)
Features	Touch sensitive control keys
Keys	Right: Volume control, Lock/Unlock key
Colors	Black, White

Cellular
3G	Bands 5(850), 8(900), 2(1900), 1(2100)
Data Speed	LTE, HSDPA+ (4G) 42.2 Mbit/s, HSDPA+ (4G) 21.1 Mbit/s, HSUPA 5.76 Mbit/s

Multimedia
Headphones	3.5mm jack
Speakers	Earpiece, Loudspeaker
Features	Album art cover, Background playback
Screen mirroring	Wireless screen share,MHL
Additional microphone(s)	Noise cancellation

Connectivity & Features
Bluetooth	4.0
Wi-Fi	802.11 a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot
USB	microUSB, USB 2.0, Features: Mass storage device, OTG, Charging, Video out
HDMI	Yes
Location	GPS, A-GPS, Glonass
Sensors	Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer
Other	Infrared, Tethering, Computer sync, OTA sync

Buyers information
MSRP	$ 400
This device has different variants: View all

Availability
Officially announced	Jul 22, 2014

Differences from the main variant:
Internal storage	16GB
MSRP	$ 320

Good screen, almost 100% sRGB coverage, sligtly higher red and green. Primitive tuning of gamma (3 fixed values only).
High screen to body ratio.
Good battery and battery life.
Good button ergonomics, small screen mode available.
Very functional and pretty UI. Some non-english services are in the phone firmware.
Easy root - in dev. firmware by default. Dual partition design for easy firmware revert.
Lots of storage in64Gb version. Sightly slower storage than newest Samsung UFS implementation but way faster than any class 10 microsd card.
Average sound pipeline (expecially inferior compared to bigger brothers with Sabre DAC and TI amp).
Some users report bad (quiet) mic or phone dynamic. No such issues on my phone yet.
Lots of models with different radios, hard to discern them. As a short guideline, in "about phone - model name" you should see either Mi 4W (3G WCDMA, no LTE) or Mi 4LTE-CU (3G WCDMA, 4G FDD-LTE - band1, band3).
Do not buy Mi 4LTE-CMCC and any other models, 3G and 4G in it will work only in China.