Gauging the top U.S. wireless and wireline power players for 2013

In our annual list of the 25 most powerful industry leaders, Fierce ranks the men and women whose decisions shape the telecom landscape. And for the first time, we've included several power players from the wireline side of the business as we found that the gap between wireline and wireless is rapidly narrowing and those who exert influence on one side of the business typically have just as much power on the other.

In the fast-changing world of telecom, power can be fleeting. No longer making the cut are Microsoft's (NASDAQ:MSFT) outgoing CEO Steve Ballmer, BlackBerry's (NASDAQ:BBRY) ex-CEO Thorston Heins and Alcatel-Lucent's (NYSE:ALU) ex-CEO Ben Verwaayen. New players include T-Mobile US' (NYSE:TMUS) CEO John Legere and Maggie Wilderotter, CEO of Frontier Communications. You can check out this year's list of movers and shakers here.