MetroPCS (PCS -5.2%) and Leap Wireless (LEAP -3.5%) slide after T-Mobile decides to revive its...

|About: T-Mobile US, Inc. (TMUS)|By:, SA News Editor

MetroPCS (PCS -5.2%) and Leap Wireless (LEAP -3.5%) slide after T-Mobile decides to revive its unlimited data plans. Sprint (S -1.5%) is off slightly. Low-end carriers have clearly decided to challenge market leaders AT&T (T) and Verizon Wireless (VZ, VOD) on price, hoping the latter's de facto price hikes will leave them vulnerable. Will the AT&T/Verizon "duopoly" continue gaining share, or are their latest pricing moves an act of hubris that will backfire?