Now that Verizon has the iPhone, AT&T is offering some sweet offers to hang onto its existing subscribers, and it has enlisted the aid of Target to accomplish that objective. Target began selling the iPhone last November three months after announcing a partnership with RadioShack to offer mobile centers in its stores, and on Friday series of trade-in opportunities were offered at the 846 stores where TargetMobile is available.

Existing iPhone users willing to sign a new two-year contract can trade in their phone and receive a credit ranging from $100 to $200 depending on the model of their current phone and the phone they intend to purchase.