AT&T vs Vodafone

AT&T Inc. is an American multinational telecommunications corporation, headquartered at Whitacre Tower in downtown Dallas, Texas. AT&T Inc. began its existence as Southwestern Bell Corporation, one of seven Regional Bell Operating Companies created in 1983 in the divestiture of the American Telephone and Telegraph Company following the 1982 United States v. AT&T antitrust lawsuit. Southwestern Bell changed its name to SBC Communications Inc. in 1995. In 2005, SBC purchased former parent AT&T Corp. and took on its branding, with the merged entity naming itself AT&T Inc. and using the iconic AT&T Corp. logo and stock-trading symbol.

Vodafone Group plc is a British multinational telecommunications company headquartered in London and with its registered office in Newbury, Berkshire. Vodafone owns and operates networks in 21 countries and has partner networks in over 40 additional countries. Its Vodafone Global Enterprise division provides telecommunications and IT services to corporate clients in over 65 countries. Vodafone has a primary listing on the London Stock Exchange and is a constituent of the FTSE 100 Index. It had a market capitalisation of approximately 89.1 billion as of 6 July 2012 It has a secondary listing on NASDAQ.