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I recently got an iPad 2 wifi only and my boyfriend just got the new iPhone 4s but if I try and FaceTime him it just rings out. I know that he only has 3G at home, is this why? And how can he FaceTime me when I have no number on my iPad? Really confused please help!

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Facetime only works over WiFi and can find people using either an e-mail address or phone number.

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That's it exactly. – Max Ried Nov 21 '11 at 9:14

I think FaceTime work only on WiFi between iOS/OS X devices. It is totally free which why the Mobile GSM operator don't want you to use it over 3G.

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