[GPSNavX]

Applies to both iPhone and iPad 3G ..

http://www.macworld.com/article/159528/2...works.html

The GPS does not need a cell or WiFi connection, but it sure helps to have one to get a much quicker position fix.


More info ..

http://support.apple.com/kb/HT1975

http://support.apple.com/kb/HT4084