T-Mobile Austria GmbH, trading as Magenta Telekom is the second largest mobile and fixed company in Austria.

[4] In 2005, T-Mobile Austria acquired mobile provider tele.ring from its parent company Western Wireless Corporation for 1.3 billion euros, and transformed it into its own lower-cost flanker brand.

[6] In December 2017, T-Mobile Austria announced it would acquire cable provider UPC Austria (originally founded in 1977 as Telekabel Wien) from its parent company Liberty Global for 1.9 billion euros.

[7] The acquisition was approved by the European Commission on 10 July 2018.

[8] The company announced plans to retire the "T-Mobile" and "UPC" brands in 2019, merging the companies under a single "T" brand.