A year ago, RadioShack filed for bankruptcy protection, and a little less than half of their retail stores were sold to a major creditor. That creditor in turn teamed up with Sprint to re-open the Shacks with mini-Sprint stores inside. Opening new stores with a buddy has apparently worked well for Sprint, and now they’re teaming up with the biggest mobile retailer in Europe to open 500 more stores in the U.S. [More]