Got that shiny new iPhone 3G for Christmas but don’t want to bail on your non-AT&T service plan? A new application to unlock the iPhone 3G is here, PC World reports. At this point, "even a cat" can get the trick done. Yes, there's always a chance you can mess up your phone, but a close reading of the instructions should keep you safe and open the door to lots of unapproved phone apps. Click on the link for step-by-step help.