Ok I was finally able to upgrade to iOS4, but I had to restore the factory settings on my 3GS, then restore from the backup I did earlier this evening. However, now it's saying on iTunes:
"This iPhone cannot be used because the Apple Mobile Device service is not started."
Ummm... huh?
How do I fix this? I can get any of my apps or my music back on my phone because iTunes won't let me sync it.
Help? Please? Thanks.