I remember that Symbian phones have the function that can check all phone record by enter *#92702689# ? Even you reset all your setting into the default mode, all phone record would still show by enter this code. I can then distinguish if this is a repaired/renewed N9.

I wonder if N9 inherits this useful function ?

Try inputting it and see.

nope, it doesn't work. Neither does *#7370# for hard reset. Tried all shortcuts when I first bought it. Only things that work are common for all devices: *#0000# and *#06#.