For Islamic banking, the opening up of Iran is a huge development, as Iranian banks make up the world’s largest financial system based on Islamic law. A large number of sukuk and other Islamic securities from Iran are expected over the next few years. Estimations are that there are over 150 Iranian companies considering Islamic sukuk sales. Iran also requires funds for its infrastructure development programs estimated at around $1 trillion over the next decade, according to a report published by Forbes. Islamic banks in the region are building their activities in key sectors of the economy. Retail banking has traditionally been the mainstay of Islamic banking in the region. Here, investment in digital and smartphone banking will be crucial in future.