You must have heard the phrase "Din-Dahare-Chori" Well, Airtel defines every aspect of this phrase.
Me (and I believe most other people here) chose Airtel because it provides a better network coverage than the other operators in our country, but that is about it.
From installing hello tunes without your permission, to stupid paid subscriptions that no person in proper sense would opt for, to disconnecting your net connection if you are using it much, to repeating the same sentence like a robot when you call their customer care, this company can, and WILL do it all.
Don’t opt for any of their connections unless there is no other alternative.