Here’s a juicy rumor that might make you wait a couple of days if you plan on getting a Sprint iPhone 4S - beginning May 18th, Sprint will offer at least a $100 trade-in credit for iPhones traded for an iPhone 4S. It’s not official yet, but TechnoBuffalo’s got a trusted source and a promo image to back that up, so it seems more likely to happen than not.
This will allow you to easily trade in your old say iPhone 3G or 3GS for the brand new 4S, and of course you’d need to sign into another 2-year agreement. The offer is said to end on June 30th. That’s a good incentive to buy an iPhone on Sprint now, isn’t it?