Sprint has confirmed that it will offer unlimited data plans for the iPhone, and has opened pre-orders for the iPhone 4 while announcing pre-orders for the iPhone 4S. “While supplies last, pre-order the iPhone 4 online today, reads a message on the carrier’s website. “The iPhone 4S will be available for pre-order on Friday, Oct. 7.” Available plans with unlimited data include the Everything Data 450 plan, which offers 450 anytime…
