Airtel can easily provide 2mbps Unlimited at 700 or so. My friend's father is a Project Manager of Airtel Africa and told that Airtel has tons and tons of bandwith unused and wasted. Because of the cheap mentality of package setters they have plans with 256kbps as post FUP because they think doing net is only doing facebook/tweeting on twitter and chatting on messengers for most Indians. As per reports 80% of Broadband users spend most of the time they allot to internet on facebook. So 256kbps is enough for them.