Microsoft Lumia 550 vs Microsoft Lumia 640 Dual SIM comparison

Compare Microsoft Lumia 550
Compare Microsoft Lumia 640 Dual SIM
key specs
Display4.70-inch5.00-inch
ProcessorQualcomm Snapdragon 210Qualcomm Snapdragon 400
Front Camera2-megapixel0.9-megapixel
Rear Camera5-megapixel8-megapixel
RAM1GB1GB
Storage8GB8GB
Battery Capacity2100mAh2500mAh
OSWindows 10 MobileWindows Phone 8.1
Resolution720x1280 pixels720x1280 pixels
general
BrandMicrosoftMicrosoft
ModelLumia 550Lumia 640 Dual SIM
Release dateOctober 2015February 2015
Form factorTouchscreenTouchscreen
Dimensions (mm)136.10 x 67.80 x 9.90141.30 x 72.20 x 8.80
Battery capacity (mAh)21002500
Removable batteryYesYes
ColoursWhite, Black-
Weight (g)-145.00
display
Screen size (inches)4.705.00
TouchscreenYesYes
Resolution720x1280 pixels720x1280 pixels
Pixels per inch (PPI)315294
hardware
Processor1.1GHz quad-core1.2GHz quad-core
Processor makeQualcomm Snapdragon 210Qualcomm Snapdragon 400
RAM1GB1GB
Internal storage8GB8GB
Expandable storageYesYes
Expandable storage typemicroSDmicroSD
Expandable storage up to (GB)200128
camera
Rear camera5-megapixel8-megapixel
Rear flashLEDLED
Front camera2-megapixel0.9-megapixel
software
Operating systemWindows 10 MobileWindows Phone 8.1
connectivity
Wi-FiYesYes
Wi-Fi standards supported802.11 b/g/n802.11 b/g/n
GPSYesYes
BluetoothYes, v 4.10Yes
NFCNoNo
InfraredNoNo
USB OTGNoNo
Headphones3.5mm3.5mm
FMYesYes
Number of SIMs12
Wi-Fi DirectYesNo
Mobile High-Definition Link (MHL)NoNo
sim 1
SIM TypeNano-SIMMicro-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesNo
sensors
Compass/ MagnetometerNoYes
Proximity sensorYesYes
AccelerometerYesYes
Ambient light sensorYesYes
GyroscopeNoNo
BarometerNoNo
Temperature sensorNoNo
sim 2
SIM Type-Micro-SIM
GSM/CDMA-GSM
3G-Yes
4G/ LTE-No

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