The boards of T-Mobile US Inc. /zigman2/quotes/204659678/composite TMUS -0.41% and Sprint Corp. have voted in favor of a merger of the two companies, which could be announced later Sunday, The Wall Street Journal reported, citing sources. The deal is expected to value Sprint shares close to Friday's close of $6.50, the paper reported. Deutsche Telekom /zigman2/quotes/205973137/delayed DE:DTE +0.10% , majority owner of T-Mobile, will control the merged entity and John Legere, CEO of T-Mobile, will head it up. The move marks the third time the two companies have attempted to combine. Sprint shares have fallen 28% in the last 12 months, while T-Mobile shares are down 4%. The S&P 500 /zigman2/quotes/210599714/realtime SPX -0.56% has gained 12% in the same time frame.