Mobile Communications Company of Iran (Persian: شرکت ارتباطات سیار ایران, Šerkat-e Ertebâtât-e Sayyâr-e Irân), commonly abbreviated as MCI and also known under its brand name Hamrah-e Avval (Persian: همراه اول; the first companion), is the first and largest Mobile network operator in Iran.

In addition, Hamrah-e Avval has also provided proper coverage over more than 52,000 km of countrywide road networks and 1120 cities throughout the country.

In line with 3rd Socio-Economic and Cultural Development of the Islamic Republic of Iran, a number of 4,590,000 new subscriptions were added to the network which in turn shows 934.8% increase and the penetration rate was increased from 0.78% at the beginning of the 3rd Socio-Economic and Cultural Development of the Islamic Republic of Iran to 7.5% by the end of the Plan.

The possibility of provision of mobile phone has emerged in 1960 in Scandinavian states (Sweden, Norway, Denmark and Finland) in 1960s.

1901/76016 of July 15, 2003 in line with implementation of Article (1) of the said Law, approved the reorganization of Distance Measurement Center in the form of Mobile Communication Company of Iran.