AT&T Inc is an American multinational telecommunications corporation, headquartered in Dallas, Texas. It is the second largest provider of mobile telephone and the largest provider of fixed telephone in the USA, and also provides broadband subscription television services.

BT Group

BT is a British multinational telecommunications company with headquarters in London. It is one of the world’s leading communications services companies, with customers in more than 170 countries. Its main activities are the provision of fixed-line services, broadband, mobile and TV products and services as well as networked IT services.


The world’s largest cable and broadcasting company in the world in terms of revenue, Comcast is also the largest internet provider in the USA. Founded in 1953, the company now has an employee base of around 135,000 and total assets in excess of $158 billion (2013).  


Ericsson is a Swedish multinational provider of communications equipment, software and services. Founded in Stockholm in 1876, it has been granted more than 35,000 patents, and claims that approximately 40% of today’s global mobile traffic runs through networks it has supplied.


Orange S.A. is a French multinational telecommunications corporation, with its headquarters in Paris. Formerly France Télécom S.A., the company was rebranded as Orange in July 2013, although Orange had been its main brand for mobile, landline, internet and Internet protocol TV services since 2006.


Samsung is a South Korean multinational conglomerate headquartered in Seoul. It comprises numerous subsidiaries and affiliated businesses, most of them united under the Samsung brand.

Sprint Corporation

Sprint Corporation, commonly referred to as Sprint, is an American telecommunications holding company that provides wireless services and is also a major global Internet carrier. It is the third largest U.S. wireless network operator as of 2014, and served 54.8 million customers at the end of the third quarter of 2014.

Telecom Italia

Telecom Italia is an Italian telecommunications company which provides landline, mobile, and DSL data services. It was founded in 1994 in a merger of several state-owned telecommunications companies.

Telefonica S.A.

Telefónica, S.A. is a Spanish broadband and telecommunications provider, headquartered in Madrid, with operations in Europe, Asia, North America and South America. Founded in 1924, the company began as a public telecommunications company. As well as the Telefónica brand, it also trades as O2 and Movistar.


Telstra Corporation Limited, usually known as Telstra, is Australia's largest telecommunications and information services. Founded in 1975 as Telecom Australia, it is headquartered in Melbourne. In Australia it provides 16 million mobile services, 7.5 million fixed voice services and 3 million retail fixed broadband services.