For middle and poor people it is of no use and they will not have infrastructure (medium-end to high end mobile phone, computer, etc) to use unlimited internet.
Still Rs.375 is affordable. Why can't you control call costs?. It is left to your hands and mouth only.
Funny instance : I asked Airtel Tamilnadu prepaid customer care when will they launch EDGE and 3G in my area and Tamilnadu. They asked what is it !!!!!!!. My god. What a technology illiteracy !!!!!!!!.