Ipod touch into iphone?

I heard that you can use wifi on your ipod touch to make call. is it true? how can you do it?

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Answers:    you can only do it through text and a computerized voice would right to be heard it. it wouldnt be inteactive-itd be like an email

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Yes you can buy a microphone and make VOIP call on a jailbroken ipod touch.

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