I know this a kinda old question but i need all your opinions..i already have a bsnl connection 500 i like it so i want to upgrade to 900 unlimited connection is it any good, what should i do to get the connection and i also want to change the modem i want the type4 modem..receantly im experienceing some problems with my connection i noticed if someboby calls to my land line the internet disconnects and vice versa and gets connected again its not supposed to happen right....with that being said i also want to know how is airtel some of my friends say its good so what are the tarrifs for the unlimited connection im getting confused here and also if i want to discontinue bsnl should i return the modem to them its monthly rental not purchased so a little help would be greatful