Holy crap! I did the same thing, reset it like 3 times, oem locked it, cleaned it up and boxed it all nice to return to best buy... For some reason i hadn't noticed that "developer" message before... The returns person turned it on and that message came up... Crap! "Huh... It never said that before..." She didn't even notice and by the time the guy who knows what he's doing showed up, it was past that screen. Phew! Got my money back, and if anyone in the Toronto area wants an N7, i can only assume that there'll be an open box discounted one on the for very soon at the best buy at 7 and Weston.