Telefónica Deutschland Holding AG provides integrated telecommunication services to private and business customers in Germany. It offers mobile and stationery voice and data services; very high data rate digital subscriber line (VDSL) internet services; fiber-to-the-home lines; broadband services, consisting of VDSL, cable, fiber, and fixed mobile substitution services; and machine to machine communication and managed connectivity services. The company also distributes various terminal devices, such as mobile phones; and offers digital products and services in the fields of Internet of Things, as well as O2 Tv, O2 cloud, and O2 Select & Stream. In addition, it provides access to infrastructure and services for its wholesale partners. The company provides its products and services through a network of independently operated franchise and premium partner shops, and online and telesales channels, as well as indirect selling channels, such as partnerships and co-operations with retailers. It markets its products and services under the O2, Blau, AY YILDIZ, Ortel Mobile, Telefonica, and Geeny brand names. As of December 31, 2021, Telefónica Deutschland Holding AG served approximately 45.7 million mobile accesses and 2.3 million fixed-line customers. The company was formerly known as Telefónica Germany Verwaltungs GmbH and changed its name to Telefónica Deutschland Holding AG in September 2012. The company is based in Munich, Germany. Telefónica Deutschland Holding AG is a subsidiary of Telefonica Germany Holdings Limited.