Starting in mid-2002, One2One was rebranded as T-Mobile. In 2012, T-Mobile merged with Orange to form EE, and in March 2015, both names were phased out.
| Predecessors: Orange | T-Mobile |
Owned by BT
| Main companies:|
Telekom Deutschland | Hrvatski Telekom (Crnogorski Telekom (76.53%) | HT Mostar (39.1%)) | Magyar Telekom | Makedonski Telekom | OTE (40%) | Slovak Telekom | Telekom Romania (54%) (via OTE) | BT (12%) | Magenta Telekom