There isn't really a problem between the iPhone and my Mac. This may seem a little ridiculous but I'm a collector and I keep all of my collections on their earliest firmware. And I know iOS 4.1 is not the original firmware for the iPhone 3GS, it's just that iOS 4.1 is the oldest firmware that is still signed by Apple and I'm unable to downgrade to 3.1.3. I do live in the US and probably the next time I go into my local Target store I'll look for that SIM card you mentioned. But anyways thank you so much for the help, I appreciate it.