I bought a SANCHARNET CARD from BSNL office last month.It is a prepaid Internet access card.The advantages of this card is to access Internet according to the recharge options. My card is of value 168Rs. Actually 25hrs, Sundays free and 11:00PM to8Am free on all days.But they included 568 call units on bill. I got 740Rs bill by doing only 30 calls for the whole month. Don't use BSNL sancharnet!