T-Mobile (TMUS) is handing the CEO baton to Srini Gopalan, the company's COO, as the carrier braces to fend off rivals in wireless and broadband. Gopalan, who will succeed Mike Sievert on Nov. 1 after the CEO's five-year run, said he is "honored and grateful" for the opportunity to build on Sievert's legacy of "disrupting the industry" while pushing further into artificial intelligence and digital capabilities. T-Mobile stock was little changed in Monday trading. Year to date, the stock is up over 7% and ...