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 fairly 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 with CNET, and while he declined to share any specific sales numbers, he noted that the iPhone launch had given T-Mobile "one of its biggest weekends in the history of the company". With the addition of T-Mobile, all four of the major U.S. carriers now offer the iPhone. Counting smaller carriers, the iPhone is now available on 22 carriers in the United States. Article Link: iPhone Launch Gives T-Mobile USA 'One of Its Biggest Weekends'