I just want to reiterate how to fix the GPS signal.

[Berek]

Having had problems with this and trying everything Navigon and other people have said I came accross a blog that said to reset the network settings. Ever since I've done that I have had no issues whatsoever. And I had dead signals for two weeks with the exception of Google Maps.

Settings>General>Reset>Reset Network Settings


Let the iphone restart and load up google maps. Let it pinpoint you for at least 5 minutes. Then load up your favorite Nav program. I only had to load up google maps once. Today on the way to work I had a precise signal all the way to work and I even took the back way through the boonies to see what would happen. No problems at all. I hope this helps those who've had the same issues I've had. Forgive me if this 'cure' is on another thread. I didn't see it anywhere.

B

 

[RiceRacerDX]

Does this also resolve the issue of having a big circle if you try and zoom in all the way instead of a blue dot??...because that's what mine is doing, and it never did this pre-3GS/pre-3.0. I have a clear line of sight to the sky with no nearby interferences (I live out in the country but near the big city [in a 5-bar 3G area, but cell info is irrelevant]). I've reset my iPhone before when this solution was originally presented a while back, but to no avail. I suppose I'll try again.

 

[Berek]

I had that problem too only I couldn't zoom in at all.

All I can say is that I reset the network settings on the phone, loaded up google maps to pinpoint my location, wait for 5 mins and everything was great. It's been three days now and no problems at all.