RadioShack has started a new promotion that allows customers to save $25 on the purchase of an AT&T or Sprint iPhone 5. The promotion will run until February 14 and applies to both new purchases and hardware upgrades for any iPhone 5 model. In addition to this deal, RadioShack's Trade and Save program is also offering up to $250 to customers who choose to trade in a working iPhone 4S, or as much as $150 for a working iPhone 4.
