If you want to make an international phone call from Iran, we consider the most convenient way, connecting to a WIFI, and call through your smartphone’s calling applications. If you don’t have any access to WIFI or any smartphones, it’s essential to know Iran’s phone code is 0098 or +98. And Also, every province has its own code. (for example, 21 for Tehran)
And if you need to buy a phonecard, we suggest you to do it in the airport, right after your arrival.