I came out to my care yesterday and I found my passenger window smashed and my Tomtom one 3rd edition stolen. I had it hidden under the seat and the mount on the window. Just when I got it all tricked out the way I want it. I do have the security code on so maybe they will not be able to use it. Anyways, is there anyway that I can find out the serial number for the unit via TomTom home? I have the unit backed up on my laptop. I did register the unit when I first opened it, but now I cannot find where I wrote down the number. Thanks for any help.