RIO DE JANEIRO, March 7, 2018 /PRNewswire/ -- Oi S.A. (B3: OIBR4 and OIBR3) – In Judicial Reorganization ("Oi" or "Company"), pursuant to Article 157, paragraph 4 of Law 6404/76 and CVM Instruction 358/02, and in addition to the Material Fact released on February 8, 2018, informs its...