Does it cost money to use Internet on an iPhone at home using Wi-Fi?

I got an iPhone. It says that it costs ¢20 per message on facebook. I hear that when your connected to Wi-Fi which I'm at home, Internet is all free. Will I be able to message people on facebook and browse the Internet while connected to Wi-Fi?

It is free on Wi-Fi.

It will always be free on Wi-Fi since it's your own internet.

Nope, its your Wi-Fi at home or anywhere els. Its only if you use 3G

It is free

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  • Will using iMessage cost me money under my provider new charge? My phone provider(telus) is adding a 40 cent per text to people outside of Canada so my question is, since me and my friend both have iPhones, if iMessage counts as a text or not cause it uses Wi-Fi?
  • Why does my iPhone still charge for Internet even when I'm not using Internet? So, I recently got a pay monthly plan with my new iPhone 4s. When i'm out and about I'm usually updating my twitter and Facebook account. But, when I'm put my phone down, 3G still says I'm using it and charging me. So do I have to turn it off when i'm finished? Or is there a much easier way?
  • If someone calls me using an iPhone app, will it cost me any extra money? My friends been calling me using an iPhone app. She is not long distance, we used to talk all the time and her phone has just been turned off (her reasoning for using the app). Will it cost me any extra money for her to do that? Its a free app.