A U.S. bankruptcy court is set to hear a dispute involving Brazilian telecoms company Oi SA and major shareholder Bratel Brasil SA, Bratel said on Wednesday, as investor discontent with Oi’s bankruptcy reorganization process shows no signs of abating, Reuters reported. On Friday, Bratel, a subsidiary of Portugal’s Pharol SGPS SA, which owns almost 28 percent of Oi’s common shares, said it had filed a legal complaint in the United States. The complaint alleges that the rights of Oi shareholders were violated as part of an agreement approved by creditors in December to severely dilute shareholders’ equity to take Oi out of bankruptcy protection. In the Wednesday statement, Bratel said Judge Sean Lane of the U.S. Bankruptcy Court for the Southern District of New York had scheduled a hearing for May 29. Read more.