I have an iPhone 3GS with iOS 5.1, and a 3G data plan that I keep enabled. I also keep "Location Services" (GPS) always on, since I use applications that take advantage of it.
However, I make a point of keeping Wi-Fi turned off because it's a battery sucker and I seldom use the phone within range of a base-station for which I'd be authorized – and I dislike the practice of hopping onto unsecured "free" networks, even briefly.
Sometimes when I need to look up an address or directions I use the Maps app. When I launch the app for the first time in what seems a while, I see a dialog telling me I should "enable Wi-Fi to improve accuracy".
I forget the exact text for the dialog, but that's the general message and the buttons are "OK" and "Settings". ("OK" apparently meaning "I get it, now go away", as opposed to "OK, enable it.") I find the dialog both irritating, and puzzling. When I dismiss it, I still get an accurate location, far as I can tell!
So I'd like to know:
Why is it that Maps is telling me the location accuracy would be improved with Wi-Fi enabled? Is there some problem with GPS that Wi-Fi can somehow compensate for? I fail to see how this would be helpful. Isn't GPS accurate enough?
In terms of dealing with the annoyance: Is there a way for me to silence that dialog once and for all? I dislike continuing to acknowledge something I've been informed of dozens of times already.