Lenovo S820 vs Lenovo P780 vs Samsung Galaxy Grand Duos comparison

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Ratings
Overall NDTV Rating--
Design Rating--
Display Rating--
Software Rating--
Performance Rating--
Battery Life Rating--
Camera Rating--
Value for money Rating--
General
Alternate names--GT-I9082-
Release dateJune 2013June 2013January 2013-
Form factorBarBarBar-
Dimensions (mm)139.50 x 69.70 x 8.95143.00 x 73.00 x 9.95143.50 x 76.80 x 9.60-
Weight (g)143.00176.00161.00-
Battery capacity (mAh)200040002100-
Removable batteryYesNoYes-
Colours--White, Blue-
SAR ValueNANANA-
Display
Screen size (inches)4.705.005.00-
TouchscreenYesYesYes-
Resolution720x1280 pixels720x1280 pixels480x800 pixels-
Pixels per inch (PPI)-294187-
Hardware
Processor1.2GHz quad-core1.2GHz quad-core1.2GHz dual-core-
Processor makeMediaTek ---
RAM1GB1GB1GB-
Internal storage4GB4GB8GB-
Expandable storageYesYesYes-
Expandable storage typemicroSDmicroSDmicroSD-
Expandable storage up to (GB)323264-
Camera
Rear camera12-megapixel8-megapixel8-megapixel-
FlashYesYesYes-
Front camera2-megapixel0.3-megapixel2-megapixel-
Software
Operating SystemAndroid 4.2Android 4.2Android 4.1-
Connectivity
Wi-FiYesYesYes-
Wi-Fi standards supported802.11 a/b/g/nNA802.11 b/g/n-
GPSYesYesYes-
BluetoothYes, v 3.00Yes, v 3.00Yes, v 4.00-
NFCNoNoNo-
InfraredNoNoNo-
Headphones3.5mm3.5mm3.5mm-
FMYesYesYes-
Number of SIMs222-
SIM1
SIM TypeRegularRegularRegular-
GSM/CDMAGSMGSMGSM-
3GYesYesYes-
4G/LTENoNoNo-
SIM2
SIM TypeRegularRegularRegular-
GSM/CDMAGSMGSMGSM-
3GYesYesYes-
4G/LTENoNoNo-
Sensors
Compass/ MagnetometerNoNoYes-
Proximity sensorYesYesYes-
AccelerometerYesYesYes-
Ambient light sensorYesYesYes-
GyroscopeNoYesYes-
BarometerNoNoNo-
Temperature sensorNoNoNo-