Airtel — "worst mobile network"

Address:

560064

I am trying to call from my airtel karnataka to my mother who is in andhra. She has idea connection and she gets calls from all mobile networks except from my airtel mobile. I am fed up of hearing the same message "currently all lines are busy, please try again". I hate this airtel connection, the mobile service is worse and i'm going to port my connection to other service provider. Airtel should be kicked out of the business and their license should be banned in india.