https://buyiphone.apple.com/WebObjects/IPACustomer.woa/wa/IPAToolAction/springboard I'm on the lowest voice plan on ATT. I waited a bit to see when white iPhone 4 would come out (sucker!) then went ahead and bought a black one anyways on 7/28. I checked my eligibility, and I have to pay $450 for the 16GB one. That is $50 more than the time I upgraded from from 3G to 3GS. Did my waiting a month screw me over at all? Please also post when you bought your current iPhone so we can compare different upgrade prices. My brother bought his sometime last Fall and has to pay $650 even for the 16gb.