Step-7: Once you are at the end of the procedure, Airtel will activate your prepaid connection. 2. How to activate New Airtel 4G postpaid SIM? Did you get an Airtel Postpaid 4G Sim Card? If yes, and you are looking to activate it, then go through the steps which are mentioned below...
prepaid refers to the payment made in advance and services are availed afterward. On the other hand, the postpaid connection is one in which you first avail the services and thereafter pay the price for it.