América Móvil (BMV :AMX / NYSE: AMX / NASDAQ: AMOV / BMAD: AMXL) is a holding company forming the fourth largest mobile network operator in terms of equity subscribers, one of the largest corporations in Latin America, and the world. America Movil is a Fortune 500 company. A venture of Carlos Slim Helú, América Móvil provides services to over 201 million wireless subscribers in the Americas, primarily in Latin America and the Caribbean.
Source: http://en.wikipedia.org/wiki/América_Móvil