3U TELECOM GmbH (3U TELECOM) is a telecommunication service provider, based in Germany. The company is a mobile network operator (MNO). It provides combined fixed and mobile services such as call-by-call, pre-selection, wholesale & resale solutions, with its own network infrastructure. The company caters a full array of calling features, services such as business solutions, tariff plans and other related packages. It provides network for advanced service, which is designed to support more valued telecommunication solutions, such as international calling services, voice mail, and secure data storage. The company operates as a subsidiary of 3U Holding AG. 3U TELECOM is headquartered in Marburg, Germany.