Yesterday we took a GEOTAB device out of a unit going to auction and placed it into another unit. I did the swap function on the site and it worked. The tech installed the device in the new vehicle and took it on a road test. It did report and show the drive route successfully. However once the unit showed as back in our shop, it promptly disappeared. I could no longer see it with either the old or new unit number, nor could I see it using the GEOTAB device serial number.