https://en.wikipedia.org/wiki/Telecommunications_in_Brazil
"The Brazilian landline sector is fully open to competition and continues to attract operators. The bulk of the market is divided between four operators: Telefónica, América Móvil, Oi (controlled by Brazilian investors and Portugal Telecom), and GVT.""GVT is the country’s most successful alternative network provider, offering landline services only."
http://www.soltelecom.com.br/ - if you can read Portuguese . - 30 clients listed , 9 Partners
https://twitter.com/sol_telecom?lang=en
https://www.linkedin.com/company/sol-telecom
http://www.soltelecomsc.com.br/
