Originally posted by seths99
my point is that I think that phones rely on that data for their navigation, especially when it comes to the map itself, whereas a stand alone gps system has the map stored on the system itself, and uses satellites to hone in on location.
I guess the question is, did you ever look at your phone during that time and see 'no service' and still have access to navigation?
Before we left, a friend gave me a tip. When you get to the area you are going to you should use the wifi at the hotel. Open google maps, and it downloads all the local area. So you always have the maps, even without wifi or gps.
Maybe a couple of times a day when I wanted confirmation we were on the right path I would open my phone and put location active and turned off airplane mode. Within a few seconds I saw where I was on the map. Turned off location, turned on airplane mode and continued on. Worked every single time.
The ironic thing was I paid around $120 to download the europe maps into the Tom Tom. I paid $50 for roaming and used maybe $5 worth in 3 weeks