This may be the lowest price for the iPhone 4S yet in the U.S., less than a month ahead of the rumored launch of the next iPhone. Sprint is being particularly aggressive moving the soon-to-be out-of-date iPhones -- perhaps because Sprint has "bet the company" on the iPhone, agreeing to pre-purchase agreements for millions of iPhones.
Update: Sprint has reached out to MacRumors with clarification on the promotion. The ad is an online web special, for new customers only, and is in place for all smartphones, not just the iPhone. The promotion is in place to drive traffic and purchases through Sprint's website.