RadioShack said its third quarter earnings jumped 23 percent, thanks in part to a spike in wireless revenue. The company reported net income of $46 million, up from $37.4 million in the year-ago quarter. Total sales rose 6.5 percent in the quarter to $1.05 billion, and wireless sales were up 26 percent. The company is preparing to expand its wireless presence with new kiosks in Target stores, under the Bullseye Mobile brand. Article