I recently port my number into the airtel, while porting it doesn’t charge me extra and at just 20 rs they port my number and without any FRC they recharged my airtel, Airtel offers that it increase our battery by 9% as it provides good quality of network coverage.
I also liked its 50% cash back offer according to which we get 50% data cash back which we use between 12 AM - 6 AM.
customer support of airtel is very nice and their responding time is OK.