I had taken mobile connection of airtel 11 years ago.So far its service is good.
Although sometimes they had deducted charges for which I had got no service.
Recently they had deducted 43RS for a call which I did not make.Apart from
that they used to deduct unaccounted money for my 2g net connection, After
that I have discontinued my net connection through customer care.So I can
not use my net in my smart phone now.However call drop is low.