Lenovo Tab 2 A7-20 vs iBall Slide Q40i vs Datawind UbiSlate 7Cx comparison

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key specs
Display7.00-inch7.00-inch7.00-inch-
Processor1.3GHz quad-core1.3GHz quad-core1GHz-
Front Camera0.3-megapixel0.3-megapixelNo-
Resolution600x1024 pixels600x1024 pixels800x480 pixels-
RAM1GB512MB512MB-
OSAndroid 4.4Android 4.4Android 4.0-
Storage8GB8GB4GB-
Rear Camera2-megapixel2-megapixelNo-
Battery Capacity3450mAh2500mAh2000mAh-
general
Release dateOctober 2015March 2015October 2013-
Battery capacity (mAh)345025002000-
Removable batteryNoNoNo-
ColoursBlack---
Dimensions (mm)--116.00 x 191.00 x 12.00-
Weight (g)--320.00-
display
Screen size (inches)7.007.007.00-
TouchscreenNoNoNo-
Resolution600x1024 pixels600x1024 pixels800x480 pixels-
hardware
Processor1.3GHz quad-core1.3GHz quad-core1GHz-
RAM1GB512MB512MB-
Internal storage8GB8GB4GB-
Expandable storageYesYesYes-
Expandable storage typemicroSDmicroSDmicroSD-
Expandable storage up to (GB)323232-
Processor make--Cortex A8-
camera
Rear camera2-megapixel2-megapixelNo-
Front camera0.3-megapixel0.3-megapixelNo-
Rear Flash-LED--
software
Operating systemAndroid 4.4Android 4.4Android 4.0-
connectivity
Wi-FiYesYesNo-
Wi-Fi standards supported802.11 b/g/n---
GPSNoNoNo-
BluetoothYesNoNo-
Bluetooth version4.00---
NFCNoNoNo-
InfraredNoNoNo-
USB OTGNoNoNo-
Headphones3.5mm3.5mm3.5mm-
FMNoYesNo-
Number of SIMs-11-
sensors
Compass/ MagnetometerNoNoNo-
Proximity sensorYesYesNo-
AccelerometerYesYesYes-
Ambient light sensorYesYesNo-
GyroscopeNoNoNo-
BarometerNoNoNo-
Temperature sensorNoNoNo-
sim 1
GSM/CDMA-GSMGSM-
3G-NoYes-
4G/ LTE-NoNo-
SIM Type--Micro-SIM-