Telefónica, S.A. is a Spanish multinational telecommunications company with registered office and headquarters located in two different places, both in Madrid, Spain. It is one of the largest telephone operators and mobile network providers in the world. It provides fixed and mobile telephony, broadband, and subscription television, operating in Europe and the Americas.
Telenor ASA is a Norwegian majority state-owned multinational telecommunications company headquartered at Fornebu in Bærum, close to Oslo. It is one of the world's largest mobile telecommunications companies with operations worldwide, but focused in Scandinavia and Asia. It has extensive broadband and TV distribution operations in four Nordic countries, and a 10-year-old research and business line for machine-to-machine technology. Telenor owns networks in 8 countries.
T-Mobile is the brand name used by some of the mobile communications subsidiaries of the German telecommunications company Deutsche Telekom AG in the Czech Republic, Poland and the United States.
Roaming is a wireless telecommunication term typically used with mobile devices, such as mobile phones. It refers to a mobile phone being used outside the range of its native network and connecting to another available cell network.
O2 (typeset as O2) is a global brand name owned by the Spanish telecommunications company Telefónica. The company uses the O2 brand for its subsidiaries in the United Kingdom and Germany. Since 2018, it is also used as an online-only flanker brand in Spain.
Telefónica Ireland was a broadband and telecommunications provider in Ireland that traded under the O2 brand (typeset as O2). O2 Ireland was previously called Esat Digifone when it was owned by Esat Telecommunications (and Telenor) from 1997 to 2006.
BT Communications (Ireland) Limited is a telecommunications and internet company in Ireland. It is a subsidiary of BT Group plc.
The FreeMove alliance is a business alliance of mobile telecommunications companies based in Europe.
Yettel Bulgaria is the largest mobile network and the third largest fixed telecommunications company in Bulgaria. The company was founded under the name "Cosmo Bulgaria Mobile" in 2001 by OTE and operated under the brand name "Globul" until 2014. In 2013 it was bought by Telenor and changed its name. In August 2018, the company was acquired by PPF, a Czech private investment fund. The company continued to use the Telenor brand until 1 March 2022, when it was renamed to Yettel Bulgaria. In February 2024, the company was acquired by e& (Etisalat), and the merger was approved by Bulgaria's competition watchdog. However the branding of Yettel has not yet been changed.
Eurotel was the trade name of the first mobile phone network in Czechoslovakia. Given the possibility of a forthcoming of split of Czechoslovakia into two separate countries, Eurotel was formed as two separate legal entities: Eurotel Praha and Eurotel Bratislava.
O2 Czech Republic (operating under the O2 brand) is a major integrated operator in the Czech Republic. It is now operating more than six million lines, both fixed and mobile, making it one of the Czech Republic's largest providers of fully converged services. O2 Czech Republic operates a fixed and mobile network including a 3rd generation network, CDMA (for data), UMTS and EDGE, enabling voice, data and video transmission. O2 Czech Republic is also a provider of ICT services.
Yettel Serbia is a Serbian mobile, fixed, internet and IPTV provider, owned by the Czech investment group PPF. It is headquartered in Belgrade. As of 2020, it is the second largest mobile telephony operator with market share of 36.98%.
Virgin Mobile UK was a mobile phone service provider. The company was launched by Virgin Group and One2One in 1999 as the world's first mobile virtual network operator (MVNO), initially using the One2One network. Virgin Mobile offered contract mobile packages, as well as mobile broadband services. It sold its services directly, as well as through price comparison sites.
The Mobile Alliance Against Child Sexual Abuse Content was founded in 2008 by an international group of mobile operators within the GSM Association to work collectively on obstructing the use of the mobile environment by individuals or organisations wishing to consume or profit from child sexual abuse content.
Hutchison 3G Enterprises S.A.R.L., commonly known as Hutchison 3G and trading as 3 (Three), is the owner of a brand name that operates several mobile phone networks and broadband Internet providers in Hong Kong, Macau, Austria, Denmark, Indonesia, Ireland, Italy, Sweden, and the United Kingdom.
Telefonica UK Limited, trading as O2 (stylised as O2), is a British telecommunications services provider, headquartered in Reading, England which operates under the O2 brand. It is owned by VMED O2 UK Limited, a 50:50 joint venture between Telefónica and Liberty Global. O2 is the UK's largest mobile network operator, with about 23.4 million subscribers as of October 2024.
Telefónica Germany GmbH & Co. OHG (German pronunciation:[teləˌfɔnɪkaːˈdʒœːɐ̯məniː]; also called Telefónica Deutschland ) is a provider of broadband, landline and mobile telecommunications in Germany. The company trades as O2 (typeset as O2).
Hutchison 3G UK Limited, trading as Three UK, is a British telecommunications company based in Reading, England. It is an indirect, wholly-owned subsidiary of CK Hutchison Holdings, a limited liability Cayman Islands company registered and listed in Hong Kong. Three is the fourth-largest mobile network operator in the United Kingdom, with about 10.9 million subscribers as of November 2024.
CETIN a.s., is a Czech telecommunications company that is part of PPF Group, an international investment group formerly majority-owned by Czech billionaire Petr Kellner. The company was created as a result of the separation of O2 Czech Republic a.s. into two companies, following a decision taken at O2 Czech Republic’s general meeting on 28 April 2015. The actual separation took place on 1 June 2015. CETIN, the new company created alongside O2, now runs the fixed-line access network, the mobile access network and international telecommunication services that were previously run by the combined O2 Czech Republic.
