Phone Comparison - Microsoft Lumia 640 XL vs Xiaomi Mi 4i vs Microsoft Lumia 650

general General Info

Manufacturer Microsoft Xiaomi Microsoft
Announced March 2015 April 2015 February 2016
Status Available - April 2015 Available - April 2015 Available - April 2016
Price Rs. 12,999 ($191.16) [Similarly Priced] Rs. 8,999 ($132.34) [Similarly Priced] Rs. 9,999 ($147.04) [Similarly Priced]
Colors Matte cyan, Orange, Black, Matte white, Glossy white Black, White, Blue, Yellow, Pink Black, White
Form Factor Candybar Candybar Candybar
Dimension 157.9 x 81.5 x 9 mm
(6.22 x 3.21 x 0.35 in)
138.1 x 69.6 x 7.8 mm
(5.44 x 2.74 x 0.31 in)
142 x 70.9 x 6.9 mm
(5.59 x 2.79 x 0.27 in)
Weight 171 g (6.03 oz) 130 g (4.59 oz) 122 g (4.3 oz)
2G Network GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 2100
4G Network - LTE LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800)
Messaging SMS, MMS, Push Mail, EMail, IM SMS, MMS, EMail, IM SMS, MMS, Push Mail, EMail, IM

hardware Hardware and OS

OS Microsoft Windows Phone 8.1 with Lumia Denim Android OS, v5.0 (Lollipop) Microsoft Windows 10
Processor Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 Quad-core 1.7 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 Quad-core 1.3 GHz Cortex-A7, Qualcomm Snapdragon 212
GPU Adreno 305 Adreno 405 Adreno 304
RAM 1 GB 2 GB 1 GB
Internal Memory 8 GB 16/32 GB 16 GB
External Memory microSD, up to 128 GB No microSD, up to 200 GB (dedicated slot)

display Display

Type IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3, ClearBlack Display IPS LCD capacitive touchscreen AMOLED capacitive touchscreen
Colors 16M colors 16M colors 16M colors
Size 5.7 inches 5.0 inches 5.0 inches
Resolution 720 x 1280 pixels (259 ppi) 1080 x 1920 pixels (441 ppi) 720 x 1280 pixels (297 ppi)
Screen-to-Body Ratio 68.88% 71.57% 66.95%
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes yes
Radio FM radio FM radio FM radio
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes yes yes

camera Camera

Rear Camera 13 MP, 4128 x 3096 pixels 13 MP, 4128 x 3096 pixels 8 MP, f/2.2
Flash LED flash LED flash 28mm
Features Auto focus, Carl Zeiss Optics, 1/3'' Sensor Size Auto focus, Geo-tagging, Touch Focus, Face/smile Detection, Panorama, HDR 1/4" Sensor Size
Video 1080p@30fps 1080p@30fps 720p@30fps
Front Camera 5 MP, 1080p [Similar] 5 MP [Similar] 5 MP, f/2.2, 720p video [Similar]

connectivity Connectivity and Data Rate

GPRS Yes Yes Yes
Edge Yes Yes 296.0/236.8 Kbps
3G HSPA 42.2/5.76 Mbps HSPA, LTE HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Bluetooth v4.0, A2DP v4.0, A2DP v4.1, A2DP, LE
Wi-Fi Wi-Fi 802.11 b/g/n, DLNA, hotspot Wi-Fi 802.11 a/b/g/n, dual-band, hotspot Wi-Fi 802.11 b/g/n, DLNA, hotspot
USB microUSB v2.0 microUSB v2.0 microUSB v2.0
GPS Yes, with A-GPS, GLONASS, Beidou Yes, with A-GPS, GLONASS Yes, with A-GPS, GLONASS, BDS
Browser HTML5 HTML5 HTML5

memory User Memory

Internal 8 GB, 1 GB RAM 16/32 GB, 2 GB RAM 16 GB, 1 GB RAM
Expandable Storage microSD, up to 128 GB No microSD, up to 200 GB (dedicated slot)

Apps Sensors

Fingerprint fingerprint not supported fingerprint not supported fingerprint not supported
Proximity Sensor proximity sensor present proximity sensor present proximity sensor present
Accelerometer Sensor accelerometer sensor present accelerometer sensor present accelerometer sensor present
NFC NFC supported NFC not supported NFC supported

battery Battery

Type Li-Ion Battery Li-Po Battery Removable Li-Ion Battery
Capacity 3000 mAh 3120 mAh 2000 mAh
Stand by Up to 936 h (2G)
Up to 936 h (3G)
- Up to 624 h (3G)
Talk Time Up to 31 h 20 min (2G)
Up to 23 h 40 min (3G)
- Up to 16 h (2G)
Up to 13 h (3G)