Quote Originally Posted by esfranky View Post
Many users of Garmin Zumo 660 with latest firmware say that is correctly unlocked the mapsource but when passed to the GPS appear locked, if you restore a previous firmware if there are unlocked
From version 3.80 and above Garmin is embedding in SW searching for "GMA Unlock Codes"! Obviously the latest SW for Zumo activates this function.

There are similar programm code in SW for Nuvi 1xxx. But it is not activated by device so far. Althought I see tread in this forum with other result today. It will be such fun if Nuvi will say TXT_Can_t_Authenticate_Maps_STR_M at the other end of the world! May be Garmin do this surprise?