I made a genius bar appointment so they can take a look at my iPhone 4. Ofcourse I'm still under 30 days but what I want to know is if they swap out my phone for a white boxed one, what happens if I want to return my ip4 and go back to my 3GS? The serial numbers won't match the box so what am i supposed to do? Ask for a brand new one in box? I highly doubt I will be going back to my 3GS but I'm asking because 1, hey you never know and 2, no one has asked this and maybe it can help someone who will find themselves in this situation. Thanx in advance.....and btw....I love the ip4 even with the reception issues!