Hi, I have the TomTom GPS app. The app is supposed to work without a network connection because it has all the maps already right? My iPhone 3GS's location service is on. Airplane mode is on, and Wifi is off, blue tooth is off. When it tries to find a GPS signal, it keeps saying ''waiting for GPS signal'' I let it stay like that for over 5-8 minutes and still no signal. But when I turn on wifi and connects to my home wifi, it gets a gps signal. and also when I turn on airplane mode and get my carrier's signal, the GPS signal appears also. i have tried getting GPS signal from within my house, streets, away from tall buildings, hill tops, parks, everywhere. Anyone have any ideas on what's going on? I thought TomTom GPS do not require network connection?? please help.