I have a Samsung SPH-M830 Galaxy Rush smartphone, and though it is not the latest in the Smartphones (including the new HUGH ones). The screen is large enough to see the GPS information displayed while driving, and its GPS by Google Maps app, speaks into my Plantronics Voyager Legend Bluetooth so I don't need to plug in a headphone (though it has a headphone jack). Just add a power adapter to keep the phone juiced, and enjoy the ride.