(Telecompaper) Brazilian operator Oi ended the fourth quarter of 2015 with BRL 6.70 billion of net revenues, down 8.5 percent on the same period in 2014. EBITDA dropped 46.6 percent to BRL 1.71 billion, and the EBITDA margin fell to 25.5 percent. Recurring EBITDA was down only 2.2 percent to BRL 1.79 billion, for a margin of 26.8 percent. Oi's net loss swelled to BRL 4.55 billion, and net debt increased 24.8 percent over the year to BRL 38.15 billion. Capex dropped 2 percent to BRL 1.08 billion. Oi said it will not provide guidance for 2016 results due to the macroeconomic instability in Brazil.