Garmin will be subscription/server based.
You will not be able to get maps on area without data connections.

same problem I am having now on amaze gps

but there is a new free gps navigation now where you can load your maps like garmin

http://we-travel.co.cc/joomla/index.php?op...catid=1&lang=en

anyone care to load it and feedback, please. tks