UPDATE 1-Brazil's Oi starts $14.3 billion bond restructure talks
April 25, 2016 at 09:32 AM EDT
SAO PAULO, April 25 (Reuters) - Oi SA on Monday formally started talks to restructure $14.3 billion of bonds, pitting some of the world's biggest investors against each other as Brazil's most-indebted phone carrier fights for its survival.