Diving into how Verizon, AT&T, Sprint and T-Mobile stacked up in Q4 2014

T-Mobile US (NYSE:TMUS) CEO John Legere may be crowing about how T-Mobile passed Sprint (NYSE: S) in total number of subscribers, but what does that mean exactly? Jackdaw Research analyst Jan Dawson breaks down key U.S. operator metrics for an in-depth look at how Verizon Wireless (NYSE: VZ), AT&T Mobility (NYSE: T), Sprint and T-Mobile performed in the fourth quarter. For a look at Dawson's research, check out this report at FierceWireless.