Private company

T-Mobile UK

Logo: Brands of the World, Public domain, via Wikimedia Commons³

Former UK mobile network

T-Mobile (UK) Limited, trading as T-Mobile UK, was a mobile network operator in the UK. First launched as Mercury One2One (stylised one2one) on 7 September 1993 by Mercury Communications, a subsidiary of Cable & Wireless, it was the UK's third mobile network - introducing innovative pricing like free evening and weekend calls to disrupt the market then dominated by BT Cellnet and Vodafone - and the first in the world to operate on the GSM 1800 band.² It is part of Deutsche Telekom.¹ It ceased to exist in 2010.¹ Wikipedia text CC BY-SA 4.0

Last updated Oct 20, 2026.

Overview

May 10, 1989Founded¹

Industrytelecommunications industry¹
HeadquartersHatfield¹
Websitewww.t-mobile.co.uk
Legal formsubsidiary company¹

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T-Mobile (UK) Limited, trading as T-Mobile UK, was a mobile network operator in the UK. First launched as Mercury One2One (stylised one2one) on 7 September 1993 by Mercury Communications, a subsidiary of Cable & Wireless, it was the UK's third mobile network - introducing innovative pricing like free evening and weekend calls to disrupt the market then dominated by BT Cellnet and Vodafone - and the first in the world to operate on the GSM 1800 band. In 1999, Deutsche Telekom acquired One2One from Cable & Wireless and MediaOne for approximately £8.4 billion.²

Corporate structure

T-Mobile UK is part of a group headed by Deutsche Telekom. 266 entities, 34 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Deutsche Telekom Bonn, Germany
- Slovak Telekom 100% · Bratislava, Slovakia
- T-Mobile Austria 100% · Wien, Austria
- T-Mobile Czech Republic 100% · Praha 4, Czechia
  - CE Colo Czech s.r.o. Subsidiary · Praha 10, Czechia
- T-Mobile Polska 100% · Warszawa, Poland
- T-Mobile UK 100% · Hatfield
- T-Systems International GmbH 100% · Bonn, Germany
- Telekom Deutschland 100% · Bonn, Germany
  - Deutsche Telekom Vertrieb Subsidiary · Germany
- Telekom (Greece) 48.29% · Marousi, Greece
  - MagentaTV Greece Subsidiary · 100% · Athens
  - OTEGlobe Subsidiary · 100% · Athens
  - Otenet Subsidiary · Athens
  - COSMOTE PAYMENTS - YPIRESIES ILEKTRONIKOU CHRIMATOS ANONYMOS ETAIREIA Subsidiary · Marousi, Greece
  - OTE Museum of Telecommunications Subsidiary · Kifisia Municipality, Greece
  - OTE PLC Subsidiary · London, United Kingdom
- Deutsche Telekom MMS Dresden, Germany
- T-Mobile US Wilmington, Delaware, United States
  - iWireless Subsidiary · Urbandale
  - Metro by T-Mobile Subsidiary · Richardson
  - Ultra Mobile Subsidiary
  - APC Realty and Equipment Company, LLC Subsidiary · Delaware, United States
  - Assurance Wireless USA, L.P. Subsidiary · Delaware, United States
  - ATI Sub, LLC Subsidiary · Delaware, United States
  - Blis Ad Platform Private Limited Subsidiary · India
  - Blis Global Spain, S.L. Subsidiary · Spain
  - Blis Italia S.r.l. Subsidiary · Italy
  - Blis Media Pty Pte. Ltd. Subsidiary · Singapore
  - Blis Netherlands B.V. Subsidiary · Netherlands
  - Blis USA, Inc. Subsidiary · Delaware, United States
  - BlisMedia (Australia) Pty Ltd Subsidiary · Australia
  - Breeze Acquisition Sub LLC Subsidiary · Delaware, United States
  - Clearwire Communications LLC Subsidiary · Delaware, United States
  - Clearwire International, LLC Subsidiary · Washington, United States
  - Clearwire Legacy LLC Subsidiary · Delaware, United States
  - Clearwire Spectrum Holdings II LLC Subsidiary · Nevada, United States
  - Clearwire Spectrum Holdings III LLC Subsidiary · Nevada, United States
  - Clearwire Spectrum Holdings LLC Subsidiary · Nevada, United States
  - Fiber JV Holdings LLC Subsidiary · Delaware, United States
  - Finco Depositor I LLC Subsidiary · Delaware, United States
  - Finco Depositor II LLC Subsidiary · Delaware, United States
  - Finco Depositor III LLC Subsidiary · Delaware, United States
  - Finco Depositor IV LLC Subsidiary · Delaware, United States
  - and 111 more
- T-Systems (Singapore) Singapore, Singapore
- Magyar Telekom Subsidiary · 59.23% · Budapest
  - FutureZone Subsidiary
- Hrvatski Telekom Subsidiary · 51% · Zagreb
  - BonBon Subsidiary · Zagreb
- Albanian Mobile Communications Subsidiary · Tirana
- Comfortcharge Subsidiary · Bonn, Germany
- congstar Subsidiary · Cologne
- Crnogorski Telekom Subsidiary · Podgorica
- Detecon Subsidiary · Cologne
- Deutsche Funkturm Subsidiary · Leverkusen, Germany
- Deutsche Telekom (United Kingdom) Subsidiary · Welwyn Garden City, United Kingdom
- Deutsche Telekom IT Solutions Slovakia Subsidiary · Košice, Slovakia
- Deutsche Telekom Services Europe Czech Republic Subsidiary · Brno, Czech Republic
- Magenta Telekom Subsidiary
- Makedonski Telekom Subsidiary · Skopje
- One Albania Subsidiary · Tirana
- and 68 more

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

The story

Founded by MediaOne and Mercury Communications on May 10, 1989.¹

Subsidiaries and ownership

Parent company

Deutsche Telekom since 1999

Owners

Deutsche Telekom 100% since 1999

From Wikidata.¹

Timeline

Apr 1, 2010Dissolved Dissolved¹
2002Renamed Name changed to T-Mobile (UK) Limited¹
1999Renamed Name changed to One2One Personal Communications Limited¹
1999Acquired Acquired by Deutsche Telekom¹
1992Renamed Name changed to Mercury Personal Communications Limited¹
May 10, 1989Founded Founded¹

Sources

The numbers on this page point here. Each one links to the record it came from.

1
WikidataT-Mobile UK on Wikidata
2
WikipediaT-Mobile UK on Wikipedia
3
Wikimedia CommonsT-Mobile UK logo by Brands of the World, Public domain
4
Wikimedia CommonsT-Mobile UK photo by The original uploader was Mrnaveed at English Wikipedia ., CC BY-SA 3.0