How to Activate ISD on Your Airtel Number

Looking for a way to activate ISD on your Airtel number? International Subscriber Dialling (better known as ISD) is what you need to speak with someone sitting abroad. Telecom operators have distinct charges for ISD calls that are significantly higher than the regular local and STD calls. However, Airtel and other telcos have some prepaid recharge packs and postpaid plans to offer discounts on their ISD calls or some free minutes to let you make international calls from your phone.