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.
Deutsche Telekom AG is a German telecommunications company headquartered in Bonn and is the largest telecommunications provider in Europe by revenue. It was formed in 1995 when Deutsche Bundespost, a state monopoly at the time, was privatized. Since then, Deutsche Telekom has consistently featured among FortuneMagazine's top Global 500 companies by revenue, with its ranking as of 2023 at number 79. In 2023, the company was ranked 41st in the Forbes Global 2000. The company operates several subsidiaries worldwide, including the mobile communications brand T-Mobile. It is the world's fifth-largest telecommunications company by revenue.
Hellenic Telecommunications Organisation S.A. is the largest technology company in Greece. It is one of the three largest companies listed in the Athens Stock Exchange, according to market capitalization.
Magyar Telekom Nyrt. is one of the leading Hungarian telecommunications service provider company. It is a subsidiary of Deutsche Telekom.
Hrvatski Telekom d.d. is a Croatian telecommunications company. Since its initial public offering in October 2007, T-Hrvatski Telekom shares have traded on the Zagreb Stock Exchange, with global depositary receipts trading on the London Stock Exchange until 2014. As of 2016, Deutsche Telekom AG owned 51% of T-HT's shares, with the Raiffeisen Mandatory Pension Funds, Croatian War Veterans’ Fund and the Croatian government's Restructuring and Sale Center holding 8.9%, 6.7% and 2.9% respectively. The remaining free float was in the hands of private investors.
One Montenegro is a mobile phone operator in Montenegro.
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%.
Wind Telecomunicazioni S.p.A., more commonly known as Wind, was an Italian telecommunications company of the VimpelCom Ltd. group, which offered mobile telephony services and, through Infostrada, also fixed-line telephony services, Internet and IPTV.
Telecommunications in Montenegro includes radio, television, fixed and mobile telephones, and the Internet.
Telekom Srbija a.d. Beograd is a Serbian state-owned telecommunications operator. It was founded in May 1997 as a joint-stock company, by spinning off the telecommunications business from PTT Srbija. In April 2015, Telekom Srbija started providing all services in Serbia under the mts brand.
.me is the Internet country code top-level domain (ccTLD) for Montenegro.
Mauritius Telecom Ltd is a provider of ICT services for both residential customers and businesses in Mauritius, including fixed, mobile, internet, TV, mobile money and ICT services.
Društvo za telekomunikacije MTEL d.o.o. Podgorica, doing business as m:tel, is a telecommunications company in Montenegro. It is a 51–49% joint venture between Telekom Srbija and Telekom Srpske.
The prevalent means of connecting to the Internet in Germany is DSL, introduced by Deutsche Telekom in 1999. Other technologies such as Cable, FTTH and FTTB (fiber), Satellite, UMTS/HSDPA (mobile) and LTE are available as alternatives.
The Internet in Croatia became a reality in November 1992 when the first international connection linking Zagreb and Vienna became operational.
Vodafone GmbH is a mobile telecommunications operator in Germany headquartered in Düsseldorf. It provides mobile phone, LTE, 5G, cable internet, landlines, cable TV, and IPTV services. As of the third quarter of 2021, Vodafone GmbH has more than 31 million mobile customers in Germany, making it the third-largest provider of mobile phone services in Germany. The company's headquarters are in the suburb of Heerdt in Düsseldorf, with regional offices throughout Germany. Vodafone Germany's main competitors are Telekom Deutschland and Telefónica Germany.
Makedonski Telekom AD is a telecommunications company in North Macedonia with headquarters in Skopje. It is part of the Magyar Telekom Group, which is a fully consolidated subsidiary of international Deutsche Telekom Group. It offers a range of telecommunications and entertainment services, such as telephone services, a range of internet access services including broadband internet, entertainment IPTV products and operates the national telephone network.
Iskon Internet was an ICT company with headquarters in Zagreb, Croatia. Other than being an Internet provider, Iskon provides fixed line telephone and IPTV access, thus offering full triple play service.
Telekom Slovenije d.d. is a telecommunications company based in Slovenia, with its headquarters in Ljubljana.
85,8 million € 
