i have an internet connection from airtel broadband . i have 4mbps unlimited plan. the connection speed is fine but the connectivity is not good, the internet connection shows to be connected but cannot open any site. this happens frequently, like once every hour . the connection is lost for 2-3 mins and then comes back. those 2 -3 mins are very annoying. many a times my important work has stopped due to this stupid bug. what should be done.