Mobile phone companies of Brazil

Claro Brasil is a mobile, satellite-television, fixed, and broadband telecommunications operator in Brazil. It was created in 2003 as a result of the union of six regional operators: Americel, ATL, BCP Telecomunicações, Claro Digital, & Tess Celular.

Multi, known by the old name of Multilaser, is an electronics company based in Brazil.

Algar Telecom is a Brazilian telecommunications company present in the states of Goiás, Mato Grosso do Sul, Minas Gerais, Paraná, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, São Paulo, and in the Federal District as well. The company is the only operator that remained private, even after the creation of Telebrás in the military regime, and it is characterized as the fifth largest company in the telecommunications segment. It serves more than one million and four hundred thousand customers - individuals, micro and small businesses, corporate customers, and carriers.

Positivo Tecnologia (B3: POSI3, formerly Positivo Informática) is a Brazilian technology company headquartered in Curitiba, Paraná. It develops, manufactures, and sells computers, cell phones, tablets, smart home and office devices, servers, IT infrastructure solutions, payment machines, and educational technologies.

IGB Eletrônica S.A. (Portuguese for IGB Electronics), doing business as Gradiente, is a Brazilian consumer electronics company based in Manaus, and with offices in São Paulo. The company designs and markets many product lines, including video (e.g. televisions, DVD players), audio, home theater, high end acoustics, office and mobile stereo, wireless, mobile/smart phones, and tablets for the Brazilian market.

The Claro Company, or simply Claro, is a Latin American telecommunications company, part of América Móvil, a Mexican telecom group. Claro serves customers in Argentina, Brazil, Chile, Colombia, Costa Rica, the Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Puerto Rico and Uruguay. Its Mexican operations are branded as Claro Mexico. The company's name means "bright," "clear," and also "of course," in both Portuguese and Spanish.

TIM Brasil Serviços e Participações S.A., commonly known as TIM Brasil, is a Brazilian telecommunications company, subsidiary of Telecom Italia Finance S.A., which provides mobile and fixed telephony services.

Sercomtel 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 was the only public telephone company in Brazil, until it was privatised and sold to the Bordeaux Fundo de Investimento in 2020.

NII Holdings, Inc. (formerly Nextel International) was an American holding company that, through its subsidiary Nextel Telecomunicações Ltda., provided mobile communications services under the Nextel brand in Latin America. NII last operated 3G UMTS/HSDPA and 4G LTE networks in Brazil, and also operated an iDEN network there until its shutdown in 2018.

Oi (Portuguese for "Hi"), formerly known as Telemar, is the largest fixed telephone operator and the fourth mobile telephone operator in Brazil, being the third largest telecommunication company in Latin America. It is headquartered in Rio de Janeiro.