How to setup iPhone 4 from computer?

harryhood said:

I have an iPhone 3G. I am going to back it up, take out the sim card and sell it, the night before I get my iPhone 4 in the mail.

I wanted to make sure that this was correct. All I have to do is toss my old sim card in my new iPhone 4 and plug it into my computer and I can set it up right?

I just want to make sure because there are no Apple stores within 800 miles of me...

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iManny said:

Thats gonna be hard considering the iphone 4 uses a micro sim, i believe when you hook the new iphone to the itunes it will ask you if you want to restore your last iphone to the new one though.

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lorenwade said:

And to further this, iTunes will also activate your new phone with your current number. No swapping SIMs.

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