So here is the situation. We have two lines on our plan, me and my wife's. Her upgrade just became available on March 3. She wants my iPhone 4s, and we're going to trade in her iPhone 4. I was thinking about going ahead and getting the iPhone 5, but I'm concerned about not waiting a few months, and seeing if the 5s becomes available, or the 5 becomes available for a lower cost. Thanks for any advice!