Next up in my series of dumb questions (many more to come, stay tuned!), I just bought an iPhone 3G and it came with a SIM. Looking under phone, I have a phone number too. How can I activate (I know that's the wrong term) the phone so I can make calls and whatnot? IE, set up a plan. PS: The phone is activated. I can play with stuff over wifi and whatnot. At least, I think that means I'm activated.