03-07-2012 12:00 AM - edited 03-07-2012 12:01 AM
Is there no plastic cover on the bottom with TomTom written on?
Like the one on the top right corner.
03-07-2012 01:08 AM
...or hold the power button until a dos-like screen comes up (DeviceId).
18-08-2012 08:19 PM
On the Via 135 it's like the picture in the lower left -- it's on the label in the recess where the microSD port and USB cable connection are. The OP couldn't see the serial number label because they had the USB cable connected. I made the same mistake.