T-Mobile US Chief Executive John Legere unveiled a plan to sponsor a concert by rapper Macklemore Ryan Lewis just a week after saying his upstart carrier wouldnt waste our money on such sponsorships. T-Mobile announced the January 23 concert in Los Angeles just over a week after Legere said he was kicked out of a Macklemore concert hosted at the Consumer Electronics Show in Las Vegas by archrival ATT Inc after he had crashed the event. The companies are in a full-scale battle to steal each others customers after No. 2 U.S. mobile service ATT on January 3 offered to pay T-Mobile customers who switch to ATT from the smaller carrier following months of direct marketing attacks from T-Mobile.