No clue if it is refurbished by the serial number. I can tell you Apple has great reputation with their refurbished items if you did get one. They replace glass, back case, and battery no matter what according to their website(I am pretty sure it was those 3 parts). Plus refurbished doesn't always mean it was a problem unit, it could be a return from someone that didn't want it within the first 30 days. I have bought their refurbs from their site with no problem, and most likely they would have sent you one if you did this through them. Don't worry, refurbs have a better quality control than new ones anyways.
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