Garmin only allows one device unlock per license, as of last year. Garmin was forced to change policy due to their contract with NavTeq (whom provides the datum). Garmin took alot of sh!t from their pissed off loyal customers because of it. Garmin has tried to make it easier with reduced prices with updates to a licensed product. Garmin has been working hard to address the high costs of licenses with NavTeq. Seems to me that Navteq pretty much has got the bull by the balls. The contract expires in 2015, and there are only a couple of players (Tele Atlas), the other in bed with Garmin's competition. Garmin tried unsuccessfully to buy both of them.