navigon

Hi everyone, I am a new member to applevis and was wondering if someone could please help me with a slight problem I am having with the gps app navigo. I baught the north america 1 and payed extra fo publi transit stuff. For some reason the public transportation allways comes up as padestrian only as the rout profile and not padestrian with voice announcements. Does anyone know how to get arround this? Thanks, Dan