Airtel is one of the worst service provider ever I seen. Once, I recharged with 2G internet pack in mobile then I was surfing internet. After sometime, I received a message that was showing that you have been charged and my main a/c bal. was deducted even internet balance was available in my phone. Then I call customer care and asked for refund and they said you have used internet and we can’t repay for that. Then I port my airtel no. into tata docomo. Service of airtel is very poor.