Telefónica Germany AG, listed on the Frankfurt Stock Exchange in the Prime Standard, with its operating companies Telefónica Germany GmbH & Co. OHG and E-Plus Mobilfunk GmbH part of the Spanish telecommunication group Telefónica SA, headquartered in Madrid, Spain. The company offers with its brands O 2 and BASE and several second and partner brands private and business customers in Germany postpaid and prepaid mobile telecom products as well as innovative mobile data services based on GPRS, UMTS and LTE technology. It also provides integrated communications provider also fixed network products such as Internet telephony for consumers, and innovative IP telephony and networking solutions in the business customer range. the offer is complemented by modern high-speed Internet products. The Telefónica Group is one of the world with a presence in 21 countries and a customer base of 329 million subscribers the largest telecommunications companies in the world.