Iphone 3G straight talk sim card?

If I have a straight talk phone, Can I just take the sim card out of it and put it in my Iphone 3G and make it prepaid? And Where do I go to put in the Pin Number on the Phone card

Yes you can put in the SIM card from your old phone and put it into the iPhone 3G. You will have to add the APN settings on the iPhone as well to make sure your voice, text, and data work. See the link in the source and watch the YouTube video on how to add the APN settings for Straight Talk into your iPhone.

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