Two days ago we brought you news that Best Buy offers the best deals in town for iPhone 5 and iPhone 4S offering $50 rebates on any model when you sign up a 2 year service agreement. Today we have another tip for you. It looks like another retailer, Radioshack, joined the trend and also began attracting the interest of last-minute shoppers by giving the same discounts. With this limited-time sale, Apple enthusiasts can get the 16GB iPhone 5 for as little as $149.99 with a new two-year contact, and the 16 GB iPhone 4S starts at just $49.99. Unlike Best Buy, Radioshack made the offer available in stores only. Both retailers have not indicated when the sale on Apple smartphones will end.