News24.com reports that illegal immigrants will soon find themselves unable to phone anyone when recently passed legislation that requires all cellphone SIM card holders to register begins to take effect. The recently passed Regulation of Interception of Communications and Provision of Communication-Related Information Act (RICA) will mean that thousands of foreigners who don't have a passport or a South African identity document, won't be able to register their SIM cards by December 2010. Vodacom Managing Director, Shameel Joosub, said RICA will require mobile operators; service providers; and SIM card retailers register all customers' identity numbers and physical addresses (with proof and confirmation) on a secure database.