Deutsche Telekom is the largest telecommunications provider in Europe and generates 70% of its revenue from subsidiaries outside of Germany. It operates in four main segments: Germany, USA, Europe, and Systems Solutions. The company offers a range of services including fixed-line and mobile communications, internet services, and customer solutions. Deutsche Telekom holds shares in telecom companies in Central Europe and has subsidiaries in over 50 countries worldwide. Its key subsidiaries include T-Mobile in the US and Tele2 in the Netherlands.