Beginning tomorrow, Radio Shack will be selling the 16GB iPhone 5s for $99 with two-year contract on AT&T, Verizon and Sprint. This is $100 off the standard $199 price and one of the lowest prices we've seen for a new iPhone 5s. It's unclear if the price drop will be permanent or just a temporary price, but a source at Radio Shack says the promotion does not currently have an end date. For many, the discount will matter less with the new pay-by-the-month phone financing plans offered by AT&T and Verizon, but for customers still on a two-year contract plan, the $100 discount could encourage customers to choose the iPhone 5s over the 5c. Radio Shack has sold the iPhone since 2009 and has often
