Prepaid customer have to purchase IR Pack at least once, to activate IR services and to be able to use IR services at PayGo rates.
If the IR service is already activated then customer can use IR services provided the customer has sufficient monetary balance in his/her account. In such case, the customer has to recharge with Top Up voucher to get monetary balance.
Also, ₹1101 pack offers 5 International SMS free which can be used to send ISD SMS while in India.