I know Airtel is the Largest Mobile Operator in India. But it gave the worst service in last couple of months. Every time there is a problem with heavy call dropping. One of the most problem I was faced from last weak that when I make a call then it Airtel told Insufficient fund in your mobile though I recharged 244 unlimited pack for Airtel call. I contacted with Airtel many times but every customer support agent told me Please restart your phone. I done it many times but there was no change. I don't expect this service from like Airtel. So please don't use Airtel because it became a fraud company and not a user friendly also.
