Verizon locks the INTERNAL gps OFF. Therefore, nav4all (and other 3rd party (non-verizon software) does not see it. Verizon offers its own gps software/functions for an additional $10/month.

I am still not sure if you pay for the verizon function, whether you can then use the internal gps for other software (non-verizon).

I personally use what is called a gps puck, a separate very small gps that talks to the 8830 using Bluetooth and it works with these 3rd party programs. The one I use is a Freedom 2000 Keychain unit.