The nation's second-largest carrier, AT&T, on Wednesday upgraded its cell phone trade-in program at its brick-and-mortar retail stores. The new terms incentivize customers to trade-in their old smartphone for one of the latest models and receive a $100 credit on-the-spot, which can be immediately redeemed against any AT&T smartphone or accessory purchase.
If you have an old iPhone or an Android phone that is less than three years old, the $100 trade-in credit lets you purchase a brand new iPhone 5 for just $99. Or, you could settle with an iPhone 4S wit zero bucks in upfront payment. By comparison, the entry-level 16GB iPhone 4S/5 normally sets you back $99/$199 after a two-year contract...