i currently am a happy owner of an iPhone 4S with AT&T. However, i'm looking to try out an unlocked Samsung Galaxy Note for a review I plan on writing. I doubt it will end up replacing my iPhone as a daily use phone, so I don't feel the need to set up an entirely new contract with the Note. i know that it's really easy to transfer out my sim card between different iPhones, but will it be just as easy to swap out sim cards between an iPhone and an Android device? perhaps complicating issues is the fact that I am on a grandfathered unlimited data plan.