Hello everyone, I'm new here so thank you for reading my question. I'll try and be short and sweet. so I replaced my stolen Iphone 3GS with a used one from craigslist. It's unlocked and the guy said he got it directly from the Apple Store. It works just fine and i made sure it is actually a 3GS.... For some reason, after a day I was curious to see if the Serial# on the box matched the Serial# on/in the phone. To my utter amazement, they did not match . When I checked selfsolve.apple.com/GetWarranty.do , the phone's serial # warranty said it expires June 22, 2010 (weird since I thought the 3GS only came out in July? but anyway...). Next I checked the serial # on the back of the box and this message came up: "We're sorry, but this is a serial number for a product that has been replaced. Please check your information and re-enter your serial number. If your information is correct, you may need to contact us." So my question to everyone here is...is it actually possible the guy just replaced the original one (bought before june 22 ?) with this one and it's now in the old box? Or does he just maybe have an iphone business and put this one in a box of one that just happened to have been replaced some time. What else could he have likely done ? Thanks everyone !