Originally Posted by
kayakdiver
My phone has a fully functional GPS without regard to cell service. So if it doesn't work my Garmin Edge wouldn't either. But I can understand why this would be a problem if your phone uses towers to pin point your location.
My iPhone also has a fully functional GPS receiver. What it doesn't have is an on-board map database. It's more than happy to tell me my exact latitude and longitude at any time, but without the ability to plot that position on a map it's useless...