While carriers find various ways to allow customers to pay for their smartphones, like T-Mobile JUMP!, AT&T Next or Verizon Edge, there are customers who still prefer the subsidized prices that come with signing a two year pact with their carriers. Since you have to pay your carrier for your service anyway, it sometimes makes sense to get them to pay (a part) for your smartphone.
The Apple iPhone 5s is one of those handsets which is a proven proven best seller even at regular carrier subsidized prices and RadioShack is giving a great deal on Apple's flagship.
Radio Shack is offering the 16GB Apple iPhone 5s for $99 on a two-year contract with either AT&T, Sprint, or Verizon.
If you happen to be upgrading from an Apple iPhone 4s, and you are willing to trade-in for it, Radio Shack will give you a $100 credit which then makes your new iPhone 5s free. That is a fine deal for Apple’s banner smartphone.
If you have been sitting on a 4s and waiting patiently for a good deal to upgrade to Apple’s latest and greatest, stop by a RadioShack location on Friday (it is an in-store deal only), and you may be able to pick up a new Apple iPhone 5s for free.
source - RadioShack