I am coming to the end of my current cell phone contract...

I know that the 750p does not have GPS, but it has Google Maps and Bluetooth. Would Google Maps work with a Bluetooth GPS Antenna on the 755p? (i.e., Would I be able to get turn by turn directions while displaying my current location on the map?).

Maybe I am asking too much here, but: If Maps and GPS does work, would I be able to use the phone (using Bluetooth) while using Google Maps and a Bluetooth GPS Antenna?