1&1 AG is a telecommunications provider operating in Germany through its subsidiaries. It reports in three segments: Access; 1&1 Mobile Network; and 1&1 Versatel. The company offers mobile internet, broadband products, and related applications such as home networks, online storage, telephony, and smart home or IP television for residential customers and small and medium-sized enterprises. It also owns and operates a mobile network based on OPEN RAN technology and sells telecommunication devices and accessories. In addition, it provides fibre-optic networks, including direct fibre connections, and individual ICT solutions such as voice, data, and network solutions. Its products and services are offered under the 1&1, WinSIM, Sim.de, yourfone, smartmobil.de, simply, PremiumSIM, and DeutschlandSIM brands. Founded in 1988 and headquartered in Montabaur, Germany, 1&1 AG is a subsidiary of United Internet AG.