Airtel Customer Drop Call Charges By send a msg as PORT your 10 digit mobile no. To 1900[MNP] You will recieve a unique code and after 4 hrs. You will recieve a msg as airtel surprise for you! Make local calls to airtel at 10p/min,other local calls at 30p/min,STD at 50p/min.Validity 30 days.Benefits will be given within 24hrs After 24hrs you will get this msg Your airtel surprise offer valid now: Local calls to Airtel@10p/min, other local calls@30p/min. This offer is Free for 30 days Now enjoy this offer free of cost. 100% working in Punjab, In Rajasthan Airtel Change 30p/min A2A and Other All india 40p/min With 90 to 180 Days Tariff Validity, This is free gift to airtel Subscriber after send to port !