Vivo: Vivo legally known as Telefônica Brasil, is the largest telecommunications company in Brazil. It is headquartered in São Paulo.The company was originally formed as part of Telebrás, the state-owned telecom monopoly at the time. In 1998, Telebrás was demerged and privatized, with Telefónica taking Telesp. Telesp was rebranded as Telefonica from 1998 until April 15, 2012, when all Telefonica services were rebranded again to Vivo, using the same strategy of unifying all its services in a unique brand, like Movistar (Hispanic America and Spain) and O2 (rest of Europe). Currently, the Telefonica brand is only used for the group Telefônica Brasil. GSM-900/1800 (GPRS, EDGE),850/2100 MHz UMTS, HSDPA,HSPA+,2600 MHz LTE.
TIM: TIM Brasil is the Brazilian subsidiary of Telecom Italia Mobile an Italian telecommunications company, which owned 67% of the company as of 2014. TIM Participações started its activities in Brazil in 1998 and since 2002 has consolidated its national presence, becoming the first mobile phone company present in all Brazilian States and have more than 70.9 million customers.The Company, through the GSM technology, has a national reach of approximately 93% of urban population and offers services to mobile and fixed telephony, data transmission and access at high speed, bringing the convergence of services for all its customers in a single company.TIM is headquartered in Rio de Janeiro and its listed in BM&F Bovespa and NYSE, in São Paulo and New York exchanges respectively.On May 5, 2012 TIM’s chairman Luca Luciani resigned from all of his duties at TIM either in Brazil or Italy. There were charges concerning scams about the activation of SIM cards for deceased and non-existing persons.GSM-900/1800 (GPRS, EDGE)
850/900/2100 MHz UMTS,HSDPA, HSPA+,1800/2600 MHz LTE.
Claro: Claro Americas is part of América Móvil, a Mexican telecom group serving clients in Argentina, Brazil, Chile, Colombia, Costa Rica, the Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Nicaragua, Panama,Paraguay, Peru, Puerto Rico, Uruguay. The company’s name means “bright”, “clear” or “of course” in Portuguese and Spanish. GSM-900/1800 (GPRS, EDGE),850/2100 MHz UMTS, HSDPA,HSPA+,2600 MHz LTE.
Oi: Oi (IPA: [ˈoj], Portuguese for “Hi”), formerly known as Telemar, is the largest telecommunications company in Brazil and South America, both in terms of subscribers and revenues. It is headquartered in Rio de Janeiro. Oi’s major subsidiaries include Telemar and Brasil Telecom.At the end of 2013 Oi had 74.5 million subscribers, including 16.9 million for landline, 50.3 million for wireless , 5.3 million for ADSL, and 1 million for other services.In 2013, Oi announced its merger with Portugal Telecom, the largest telecommunication company in Portugal, in order to strengthen the Brazilian firm and simplify its ownership structure. In June 2015 Portugal Telecom was acquired by Altice Group. GSM-1800 (GPRS, EDGE)
2100 MHz UMTS, HSDPA,2600 MHz LTE.
Nextel:Nextel Communications, Inc. was a wireless service operator that merged with and continues to exist as a wholly owned subsidiary of Sprint Corporation. Nextel in Brazil is part of NII Holdings, a stand-alone, publicly traded company that is not owned by Sprint Corporation.Nextel Communications traces its roots to the 1987 foundation of FleetCall by Morgan O’Brien, Brian McAuley, Chris Rogers, and Peter Rein heimer. FleetCall changed its name to Nextel Communications, Inc. in 1993. Nextel provided digital, wireless communications services, originally focusing on fleet and dispatch customers, but later marketed to all potential wireless customers. Nextel’s network operated in the 800 MHz Specialized Mobile Radio band and used iDEN technology developed by Motorola. Nextel’s iDen network offered a then unique push-to-talk “walkie-talkie” feature in addition to direct dialed voice calls. Nextel was one of the first providers in the United States to offer a national digital cellular coverage footprint. IDEN,2100 MHz UMTS, HSDPA, HSPA+,1800 MHz LTE.
Algar Telecom: Algar Telecom, formerly known as CTBC, is a Brazilian telecommunications company. The company offers advanced services on landline and mobile phone (GSM and 3G), broadband, and cable TV (DTH). Currently it is present in parts of Goiás, Minas Gerais, Mato Grosso do Sul and São Paulo for consumers, Paraná, Rio de Janeiro, Rio Grande do Sul, Santa Catarina and Distrito Federal for business companies. GSM-900/1800 (GPRS, EDGE),2100 MHz UMTS, HSDPA, HSPA+.
Sercomtel: Sercomtel (Portuguese pronunciation is a local phone and internet service provider in the state of Paraná, Brazil. Its phone service ranges includes landline service, mobile and long distance, and broadband internet service. It is the only public phone company in Brazil.Until 2008, Sercomtel had the concession to provide service only in two municipalities (Londrina and Tamarana), even providing service in neighboring cities. GSM-900/1800,850 MHz UMTS, HSDPA