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iPhone 3GS sim compatible with iPhone 4?

1338 Views 3 Replies Latest reply: Jul 15, 2010 12:49 PM by gizzys dad RSS
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Jun 24, 2010 12:47 PM
quick question...
does the iPhone 3G sim card work in the iPhone 4?
like if I order the iPhone 4 with my mothers renew through AT&T will I be able to use my 3G sim card in it? and would I still have to activate it when I receive it or would it cancel my mothers current sim card in her 3GS?

Thanks in advance.


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