I've seen several posts that lead me to believe they were able to go somewhere and it told them when they were eligible to upgrade. I went to the AT&T site and all it said was that I was not eligible to upgrade at this time. I think I purchased my iPhone sometime last September, but I sure would like to know the exact date I'd be eligible to upgrade as I've seen 2 years, 18 months and even 12 months (if primary line, which I am). Anyone know how to find out your exact upgrade date?