Text Free is an app that lets you text people from an iTouch/iPhone and has calling capabilities and you can buy minutes for it at a really cheap price. My question is can you buy an iPhone without a contract, just pay the $30 a month data plan to get international Wi-Fi and have people call/text you through text free?

http://itunes.apple.com/us/app/textfree-with-voice/id399355755?mt=8

I tryed to Google/Wiki Answers/Yahoo Answers but couldn't find anything. I'm asking anybody here who has the iPhone or could tell me.