Pennsylvania is joining more than a dozen states that have filed a lawsuit aimed at stopping T-Mobile US’s $26 billion purchase of Sprint , New York Attorney General Letitia James said in a statement on Wednesday. The U.S. District Court in Manhattan has ordered that the trial be delayed to Dec. 9, a victory for the states, which said they needed more time to investigate the deal. The Federal Communications Commission has indicated it plans to approve it and has begun the process of formally doing so.