My 3gs went into hardware failure! I have tried for 2 days to find iphone 4, best buy, att, radio shack, nothing. I walk into walmart tonight and they had some? go figure. I bought a 16 gig - man this thing blows away the 3gs, now i wish i had bought a 32 gig. The biggest thing for me is being able to control the volume on the iphone for my bluetooth headphones!!!!!!!!!!