I've tried jailbreaking on 2 iPhone 3G's and one iPhone 1g, but keep getting an "Error 1604" in iTunes. I've even tried doing an iPhone fresh on a different computer using Winpwn and got error 1602. I mean, this has never happened before. I must've done 10 of my friends iPhone's and nothings ever went wrong. Just a couple of days ago I had this problem. What's wrong??