Quote Originally Posted by Juandc View Post
Hello, I'm brand new here. Yesterday, I tries to install the City Navigator in my GARMIN OREGON 300. Suddenly, the program made an update of the firmware of my Oregon...without asking!! After the update, I lost all my installed maps, and it is very dificult to install new maps... or unlocking them. When I start up, my Oregon says "Can't Authenticate maps" Help?? Can I put back the earlier version of the firmware, or do you have another solution? Thx
If yours are legal maps go to mygarmin and redownload unlock and gma files-
-to unlock every imgs you can try also fast img unlocker (sticky thread in garmin soft and tools section)