Internet connection is rather fast, and most of the social media platforms are blocked except for Instagram and Whatsapp.
You can connect to the Internet either by Wi-Fi or by the internet data of your SIM-card. You can easily buy a SIM card in Iran and access to the internet.
There are three mobile network providers in Iran. Hamrahe-Aval (MCI), Irancel and RighTel provide 4G SIM cards for international tourists. Different type of SIM cards are available, and you can choose one based on your need.
3G/4G prepaid SIM card offers advanced services such as video calls, high-speed connectivity, conference call, multimedia messages, and value-added services for subscribers.
Also the internet usually available in four and five stars hotel for free. In addition, you can connect to the internet in some café, restaurants, and malls.