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http://www.griffintechnology.com/products/itripse

I mean it works with the iPod Touch, and it seems that just about everything inside and outside the iPhone works with the iPod Touch. So has anyone tried this?

That one won't work as it you'll get a lot of interference from the iPhone's GSM signal. It might work with Airplane mode on but then you won't be able to recieve or make calls. Griffin makes a transmitter specifically shielded for the iPhone but its for car use only. I'm actually waiting for a portable on like that one but shielded.
 
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