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

 Compare Microsoft Lumia 640 Dual SIM
Microsoft Lumia 640 Dual SIM
Compare Microsoft Lumia 640 XL LTE Dual SIM
Microsoft Lumia 640 XL LTE Dual SIM
Compare Xiaomi Mi 4
Xiaomi Mi 4
key specs
Display5.00-inch5.70-inch5.00-inch
ProcessorQualcomm Snapdragon 400Qualcomm Snapdragon 400Qualcomm Snapdragon 801
Front Camera0.9-megapixel5-megapixel8-megapixel
Rear Camera8-megapixel13-megapixel13-megapixel
RAM1GB1GB3GB
Storage8GB8GB16GB
Battery Capacity2500mAh3120mAh3080mAh
OSWindows Phone 8.1Windows Phone 8.1Android 4.4
Resolution720x1280 pixels720x1280 pixels1080x1920 pixels
general
BrandMicrosoftMicrosoftXiaomi
ModelLumia 640 Dual SIMLumia 640 XL LTE Dual SIMMi 4
Release dateFebruary 1, 2015March 1, 2015July 1, 2014
Form factorTouchscreenTouchscreenTouchscreen
Dimensions (mm)141.30 x 72.20 x 8.80157.90 x 81.50 x 9.00139.20 x 68.50 x 8.90
Weight (g)145.00171.00156.00
Battery capacity (mAh)250031203080
Removable batteryYesYesNo
Launched in India--Yes
Colours--White
display
Screen size (inches)5.005.705.00
TouchscreenYesYesYes
Resolution720x1280 pixels720x1280 pixels1080x1920 pixels
Pixels per inch (PPI)294259-
Aspect ratio--16:9
hardware
Processor1.2GHz quad-core1.2GHz quad-core2.5GHz quad-core
Processor makeQualcomm Snapdragon 400Qualcomm Snapdragon 400Qualcomm Snapdragon 801
RAM1GB1GB3GB
Internal storage8GB8GB16GB
Expandable storageYesYesNo
Expandable storage typemicroSDmicroSD-
Expandable storage up to (GB)128128-
camera
Rear camera8-megapixel13-megapixel13-megapixel (f/1.8, 1.12-micron)
Rear flashLEDLEDLED
Front camera0.9-megapixel5-megapixel8-megapixel (f/1.8)
Rear autofocus--Yes
software
Operating systemWindows Phone 8.1Windows Phone 8.1Android 4.4
Skin--MIUI 6
connectivity
Wi-FiYesYesYes
Wi-Fi standards supported802.11 b/g/n802.11 b/g/n802.11 a/b/g/n/ac
GPSYesYesYes
BluetoothYesYes, v 4.00Yes, v 4.00
NFCNoYesNo
InfraredNoNoYes
USB OTGNoNoYes
Headphones3.5mm3.5mm3.5mm
FMYesYesYes
Number of SIMs221
Wi-Fi DirectNoYesNo
Mobile High-Definition Link (MHL)NoNoNo
Micro-USB--Yes
sim 1
SIM TypeMicro-SIMMicro-SIMMicro-SIM
GSM/CDMAGSMGSMGSM
3GYesYesYes
4G/ LTENoYesNo
sim 2
SIM TypeMicro-SIMMicro-SIM-
GSM/CDMAGSMGSM-
3GYesYes-
4G/ LTENoYes-
sensors
Compass/ MagnetometerYesYesYes
Proximity sensorYesYesYes
AccelerometerYesYesYes
Ambient light sensorYesYesYes
GyroscopeNoNoYes
BarometerNoNoYes
Temperature sensorNoNoNo
ratings
Overall NDTV Rating--Read Review
Design Rating--
Display Rating--
Software Rating--
Performance Rating--
Battery Life Rating--
Camera Rating--
Value for Money Rating--
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