Lava Xolo Q600 (Rs 6,900): The Xolo Q600 is currently the cheapest quad core processor powered android smartphone on the market. Powered by 4.2 Jelly Bean operating system, a 1.2 GHz quad core processor and Power VR SGX544 GPU aided with 512 MB RAM, the phone has great hardware in this price-point. A 4.5 inch and 4 GB internal storage, expandable to 32 GB, make it money well spent.