All foreign telecommunication operators run in Iran and in case of using these operators, roaming charges will be applied based on the related tariffs. We recommend you to buy a prepaid sim card from one of the providers Irancell and Hamrahe-Aval (MCI). You can easily buy a sim card up on your arrival at the Airport outside transit hall where you will find the of operators’ stands. The only document you need is only your passport copy. You can have internet access on your sim card buying an internet package or Use free Wi-Fi in Hotels and some restaurants or coffee shops.