well i was largely speaking based on the statements by mathew. i do not know how cheap or expensive the bandwidth is for airtel. but it is going to be cheaper than 5 bucks. and even at these prices... asking unlimited plans with 5/10/20 mbps is sort of complicated for a fixed pricing like 2k/3k/5k. so i am just taking 5 bucks as a reasonable point. and assuming that 10 bucks per GB should be profitable enough for any decent ISP. and that means that customers should not be charged more than this amount no matter what plan they are on.they might have the networks but i would imagine that there is still a cost related to connectivity with international data centers and since majority of what we access is hosted in USA or probably europe... there would be costs. of course, there are also costs related to maintenance and expanding the network. and then there are salaries, local infrastructure, marketing blah blah. i am just taking the worst case scenario here.