Last Friday, T-Mobile USA Chief Marketing Officer Mike Sievert told AllThingsD that the carrier's iPhone launch that day had been "gangbusters" for the carrier with "lines out the door" at its retail stores. While the lines dissipated fairy quickly, T-Mobile undoubtedly believes that the strength of the iPhone and new "Uncarrier" plans unbundling device cost from service charges will help its standing in the competitive U.S. carrier market over the long-term. Sievert has now followed up wi
