Airtel is the worst internet service provider in Gurgaon. They call u a million times to sell connection, but in case of issues, no one takes responsibility. They keep transferring ur call from one executive to another and take weeks to re-connect a broken wire. Mostly, as soon as the technician leaves, the issue appears again and u have to wait again. Their speed after 10 GB (which they claim to be 256 Kbps) seems to be less than 50 Kbps. And it all has started after their new plan of "Speed on Demand".
The 24*7 customer service is pathetic. Either they do not pick up the call OR they say their applications are updating so they cannot do anything. They ask you to call in the morning. So, if you work from home or you do important work at night, Airtel should be the least preferred ISP.