Ribeirão do SulRibeirão do Sul is a municipality in the state of São Paulo in Brazil. The population is 4,539 in an area of 203 km2.WWW ribeiraodosul.sp.gov.brMediaIn telecommunications, the city was served by Telecomunicações de São Paulo. In July 1998, this company was acquired by Telefónica, which adopted the Vivo brand in 2012. The company is currently an operator of cell phones, fixed lines, internet and television.