The newest smart phones probably won't be free but will be at a reduced rate.

I'm on Sprint and I'm going to get the HTC EVO very soon. It retails for around $550 and I can get it for $200 because I've had my current phone for about 2 years.

Microsoft is coming out with their new Windows Mobile Phone in the next couple of weeks. But it won't be available for Sprint for another 6 months.