Dear MacRumours, When I use my beloved Navigon app, I suppose it lets the GPS get assisted. So, my question is - does the GPS get assisted by the datanetwork (2G or 3G), or the standard network? Or have I misunderstood how it works?! I am asking because I wish to travel with my iPhone and Navigon through Europe. As I will not bring my simcard (no roaming charges for me), I thought about just buying a prepaid simcard in each country, just to get a signal. Will this signal be enough for the GPS to be assisted, or will I need to get a prepaid dataplan also? Thanks!