Slovak Telekom

2004–2006
Following the acquisition of most of Slovak Telecom by Deutsche Telekom, it introduced a new logo in 2004. At the time, it was one of the few subsidiaries of Deutsche Telekom not to use the magenta T logo.

2006–2013
Slovak Telecom became Slovak Telekom in February 2006 to reflect its ownership by Deutsche Telekom.

Eurotel: 1990–1993


Eurotel was founded in 1990 as a joint venture between SPT Telecom, US West (now part of AT&T) and Bell Atlantic (now part of Verizon Communications).

Eurotel Bratislava: 1993–2005
Following the split of Czechoslovakia into the Czech Republic and Slovakia, Eurotel split into Eurotel Bratislava and Eurotel Praha (now O2). Eurotel Bratislava continued to use the 1990 logo until 2005.

T-Mobile: 2005–2010
The Eurotel brand was replaced by the T-Mobile brand in 2005.

Telekom: 2010–present
The T-Mobile brand was replaced by the Telekom brand on 1 July 2010.