is it worth to buy airtel broadband connection with 4mbps link ?i already have dataone 2mbps unlimited plan and i am planning to have backup route.i tried reliance but as its really costly than what i have bsnl and its also unreliable i am discontinuing with reliance broadband.can anyone tell me if airtel is good enough and use different backbone than dataone ?so as i can have backup route whenever bsnl dataone goes down ?also i heared airtel has 8mbps plan but dont know if they are giving in gujarat > Ahmedabad or not ?please guide me.