Karbonn Mobile has officially launched their new Dual SIM smartphone Smart A12 for Rs. 7,990/- This phone comes with 4.5-inch display screen with screen resolution of 854×480 pixels. It is powered by 1GHz ARM Cortex A9 processor with 512 MB of RAM.
It runs on Android 4.0 aka ICS, at back it has 5 MP camera and a front facing camera too. It has 1800 mAh battery, which might be not enough for you for a day. It do support microSD card.
For connectivity it has 3G, micro USB, Bluetooth, WiFi and GPS. Recently Micromax has also launched some big screen smartphones within the same range.