Telefónica is one of the largest telecommunications companies in the world in terms of number of clients and market capitalization. Its activities are centered mainly on the fixed and mobile telephony businesses with broadband as the key tool for the development of both.

Telmex Internacional is a Mexican holding company providing through its subsidiaries in Brazil, Colombia, Argentina, Chile, Peru and Ecuador a wide range of telecommunications services, including voice, data and video transmission, Internet access and integrated telecommunications solutions; pay cable and satellite television;

América Móvil is the leading provider of wireless services in Latin America. As of June 30, 2008, it had 165.3 million wireless subscribers and 3.9 million landlines in the Americas. América Móvil (NYSE:AMX) is a listed company in the US and México with a current market value of over $40 billion.