I just bought my first iPhone last week.. got the 4. I wanted to wait until the 5 came out, but my husband is going away for a while and I wanted to get under his phone plan & carrier before he left, so I had to do it now. The employee we were working with @ AT&T mentioned something about how Apple usually allows customers a grace period/window.. if they purchased their iPhone within a certain time period of another one coming out, they'll allow them to upgrade to the new one at the discounted price ($199). Is this true? Can't seem to find any information on it. And if so, how big of a window/time-frame is it? Thanks.