Xiaomi Mi 4 vs Xiaomi Mi 4 LTE vs Microsoft Lumia 640 XL LTE Dual SIM

General Info

Manufacturer
Xiaomi	Xiaomi	Microsoft
Announced
July 2014	December 2014	March 2015
Status
Available - Q3 2014	Available - December 2014	Available - April 2015
Price
-	Rs. 11,999 ($176.46) [Similarly Priced]	Rs. 14,999 ($220.57) [Similarly Priced]
Colors
Black, White	White	Matte cyan, Orange, Black, Matte white, Glossy white
Form Factor
Candybar	Candybar	Candybar
Dimension
139.2 x 68.5 x 8.9 mm (5.48 x 2.7 x 0.35 in)	139.2 x 68.5 x 8.9 mm (5.48 x 2.7 x 0.35 in)	157.9 x 81.5 x 9 mm (6.22 x 3.21 x 0.35 in)
Weight
149 g (5.26 oz)	149 g (5.26 oz)	171 g (6.03 oz)
2G Network
GSM 850 / 900 / 1800 / 1900	GSM 850 / 900 / 1800 / 1900	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network
HSDPA 850 / 900 / 1900 / 2100	HSDPA 850 / 900 / 1900 / 2100	HSDPA 850 / 900 / 1900 / 2100
4G Network
LTE	LTE - international model	LTE
Messaging
SMS, MMS, EMail, IM	SMS, MMS, EMail, IM	SMS, MMS, Push Mail, EMail, IM

OS
Android OS, v4.4.3 (KitKat)	Android OS, v4.4.3 (KitKat)	Microsoft Windows Phone 8.1 with Lumia Denim
Processor
Quad-core 2.5 GHz Krait 400, Qualcomm MSM8974AC Snapdragon 801	Quad-core 2.5 GHz Krait 400, Qualcomm MSM8974AC Snapdragon 801	Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400
GPU
Adreno 330	Adreno 330	Adreno 305
RAM
3 GB	3 GB	1 GB
Internal Memory
16/64 GB	16 GB	8 GB
External Memory
No	No	microSD, up to 128 GB

Type
IPS LCD capacitive touchscreen	IPS LCD capacitive touchscreen	IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3, ClearBlack Display
Colors
16M colors	16M colors	16M colors
Size
5.0 inches	5.0 inches	5.7 inches
Resolution
1080 x 1920 pixels (441 ppi)	1080 x 1920 pixels (441 ppi)	720 x 1280 pixels (259 ppi)
Screen-to-Body Ratio
72.14%	72.14%	68.88%
Multi-Touch

Rear Camera
13 MP, 4128 x 3096 pixels	13 MP, 4128 x 3096 pixels	13 MP, 4128 x 3096 pixels
Flash
Dual-LED Flash	dual-LED flash	LED Flash
Features
Auto focus, 1/3' Sensor Size, 1.12µm Pixel Size, Geo-tagging, Touch Focus, Face And Smile Detection, HDR	Auto focus, 1/3' Sensor Size, 1.12�m Pixel Size, Geo-tagging, Touch Focus, Face/smile Detection, Panorama, HDR	Carl Zeiss Optics, 1/3'' sensor size
Video
2160p, 1080p@30fps, HDR	2160p@30fps, 1080p@30fps, 720p@120fps, HDR	1080p@30fps
Front Camera
8 MP, 1080p@30fps	8 MP, 1080p@30fps	5 MP, 1080p

GPRS
Yes	Yes	Yes
Edge
Yes	Yes	Yes
3G
DC-HSDPA, 42 Mbps; HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE	HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps	HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Bluetooth
v4.0, A2DP	v4.0, A2DP	v4.0, A2DP
Wi-Fi
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, hotspot	Wi-Fi 802.11 b/g/n, DLNA, hotspot
USB
microUSB v2.0 (MHL), USB On-the-go	microUSB v2.0, USB Host	microUSB v2.0
GPS
Yes, with A-GPS, GLONASS	Yes, with A-GPS support, GLONASS, Beidou	Yes, with A-GPS, GLONASS, Beidou
Browser
HTML5	HTML5	HTML5