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Telefónica Deutschland Holding AG, together with its subsidiaries, 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 digital services in the fields of Internet of Things, as well as O2 Tv and O2 cloud.