File photo of a woman talking on her mobile phone while passing mural on wall of former U.S. embassy in Tehran

A woman talks on her mobile phone while passing a mural on a wall of the former U.S. embassy in Tehran in this November 5, 2008 file photo. MTN Irancell, a fast-growing Iranian mobile-phone network managed to obtain sophisticated U.S. computer equipment despite sanctions that prohibit sales of American technology to Iran, interviews and documents show. REUTERS/Morteza Nikoubazl/Files. (IRAN – Tags: POLITICS)