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Deutsche Telekom Mobilfunk (DeTeMobil)
In 1996, DT began to brand its subsidiaries with the T- prefix, renaming the DeTeMobil subsidiary to T-Mobil.
In 2002, as DT consolidated its international operations, it anglicized the T-Mobil name in German to T-Mobile. It also replaced the T-D1 brand, although Germans sometimes continue to refer it as D1.
In 2010, T-Mobile business in Germany merged with its sister company T-Home and began to use the Telekom brand in line with its parent, Deutsche Telekom.
Later, those European subsidiaries of Deutsche Telekom which had the name 'Telekom' in the holding company name (e.g., Hrvatski Telekom and Slovak Telekom) dropped the T-Mobile name in favor of the Telekom brand.
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