Nice work! But about your question: no, to complicated for me . If i need navigation by mobile-phone (e.g. forgotten Go920 in the car), i use my Note II with the Go-App (or the older v1.7) and always without mobile data and the tomtom-services [2-3 times a year, co-driver is mobile-holder]. In case of mobilephone-navigating i'm not a speed-junkie and need no speed-camera-service. Or sometimes i use mobilphone also as pedestrian navigation, e.g. tourist landmarks in foreign cities, also with deactivated mobile data and services.