so after all this time waiting mine arrived today, and i just called to switch activation from my 3gs to the 4. It said turn the phone off for 5 minutes and i did so for 15 turned it on and it just told me to plug it into itunes. When i did it said i need OSX10.5.8 to use it. I have an iMac 5, 1, only two years old or so and i know that should be my OS. It seems when i brought my imac in to be fixed the guy downgraded my OS, so when i went to download 10.5.8 it wouldnt open because i dont have 10.5. My current OS is showing 10.4.9. Am i in real trouble here? I dont have a phone to call ATT with right now. Is there no way i can just download 10.5? Im certain this ran it before i brought it in to get fixed.