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Oi SA engages in the provision of telecommunications utility services. The firm offers mobile, broadband, pay television, data transmission, and Internet provider services. It operates through the following segments: Residential Services, Personal Mobility, and B2B Services. The Residential Services segment focuses on the sale of fixed telephony services including, voice services, data communication services, and pay TV. The Personal Mobility segment offers mobile telephony services to subscription and prepaid customers, and mobile broadband customers. The B2B Services segment includes corporate solutions offered to small, medium-sized, and large corporate customers including, voice services and corporate data solutions, as well as certain interconnection services, wholesale network usage services, and traffic transportation services. The company was founded on November 27, 1963 and is headquartered in Rio de Janeiro, Brazil.

Telecom Argentina S.A., together with its subsidiaries, provides telecommunications services. The company offers mobile telecommunications services, including voice communications, high-speed mobile Internet content and applications download, online streaming, and other services; and sells mobile communication devices, such as handsets, Modems MiFi and wingles, and smart watches. It also internet connectivity products, including virtual private network services, traditional Internet protocol links, and other products; and programming and other cable television services. In addition, the company offers telephone services, including local, domestic, and international long-distance telephone services, as well as public telephone services; and other related supplementary services, such as call waiting, call forwarding, conference calls, caller ID, voice mail, itemized billing, and maintenance services. Further, it provides Infrastructure, interconnection, datacenter, Internet, value added, and international long-distance services; and data services, including data transmission, virtual private networks, symmetric Internet access, national and international signal transport, and videoconferencing services; Personal Pay, a digital wallet service; and management and administration services. The company was formerly known as Cablevisión S.A. and changed its name to Telecom Argentina S.A. in January 2018. Telecom Argentina S.A. was founded in 1979 and is based in Buenos Aires, Argentina.

Telefónica Deutschland Holding AG, together with its subsidiaries, provides integrated telecommunication services to private and business customers in Germany. It offers 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 offers digital services in the fields of Internet of Things, as well as O2 Tv and O2 cloud. In addition, it provides access to infrastructure and services for its wholesale partners. Further, 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, and Telefonica brand names. 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 operates as a subsidiary of Telefonica Germany Holdings Limited.