Can i use a straight talk sim card in an iphone 3g?

And pay the prepaid price? If so… What's the process of doing this and getting the phone to work… Do i buy just the sim card… Or the sim card plus the prepaid monthly plan, does it matter what sim card i buy… Is there a certain one i would need? Also before doing anything to the sim card, what sets do i have to do? To activate it in the iphone 3g… Thanks

If your phone is unlocked, yes, you can.

You have to buy a Straight Talk sim card from the Straight Talk website for $15. Then you have to buy a $45 unlimited talk, text and web airtime card from the Straight Talk website or Wal-Mart.

Once you have the Straight Talk sim card and airtime card you have to go to the Straight Talk website and activate your phone here.
http://www.straighttalksim.com/index.php

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