...questions. Please help :]? Ok, so I was one of those that preordered the iPhone 4. I've loved it since I got it but I played around with the HTC inspire while at the AT&T store and fell a little in love to. I'm getting one tomorrow but have some questions.

1) Will my iPhone 4 sim card fit the HTC inspire?

2) I have the unlimited data plan that AT&T offered a while ago and have had it ever since. Will AT&T make me change to one of their new data plans??

3) I've heard there's an "extra charge" AT&T charges you for having a 4G phone like the HTC inspire. Is this true?? If so, how much do they charge??

Or is it as easy as switching out the sim card and im good to go?? Thanks so much :]