The two sides have agreed that after the merger, T-Mobile Chief Executive John Legere would serve as the CEO and Dish CEO Charlie Ergen would become the combined company’s chairman, the Journal said. T-Mobile has a market capitalization of about $31.06 billion, while Dish has a market capitalization of $32.77 billion. Reuters could not immediately reach Dish or T-Mobile for comment outside regular U.S. business hours.