I had trouble activating my iPhone when it came in the mail on the 14th. It showed No service, and popped up a "SIM Failure" error every few minutes. I couldn't understand why because I'd never needed a SIM card, being a CDMA user and all. So I decided to open my SIM card slot and have a look. Somehow, there was a SIM card installed in my iPhone that was causing all of my issues. Did anyone else have this problem? Anyone know anything about this?