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JFN
10-20-2008, 07:53 PM
Well it appears my 3G GPS will NOT function without cell service, I was in the middle Highway 20 in northern California today stopped for road construction and was going to kill time and see where I was on the GPS. Clear view The of southern sky, Satellite radio was working fine. Is this just a problem or a normal function of the I phone GPS which if it is is not truley GPS? The error msg was cannot connect to cell service.



John
PapaST
10-20-2008, 08:01 PM
Maybe it has to use cell signal to assist in triangulating your location. Some GPS units can take awhile to search for satellites. I'm sure that can be a big battery drain. So maybe it's programmed to only use GPS if it can use cell service to assist in satellite search.
dturner
10-20-2008, 08:27 PM
From Apple website:
Maps on iPhone 3G combines GPS, Wi-Fi, and cell tower location technology with the Multi-Touch interface to create the best mobile map application ever.

http://www.apple.com/iphone/features/gps.html
Saverino
10-20-2008, 09:39 PM
The GPS on my iPhone works even if I don't have a SIM card in or Wi-Fi access.

It finds my location with the blue dot but doesn't load the map...obviously.
JFN
10-21-2008, 12:41 AM
From Apple website:
Maps on iPhone 3G combines GPS, Wi-Fi, and cell tower location technology with the Multi-Touch interface to create the best mobile map application ever.

http://www.apple.com/iphone/features/gps.html


Thanks, according to your link I read that the GPS should work without cell service or wifi, wifi and towers to be used in lieu of no GPS signal. Am I reading correctly?
BigCiX
10-21-2008, 12:51 AM
Wow I didn't know your GPS can work without service.
Saverino
10-21-2008, 01:25 AM
Thanks, according to your link I read that the GPS should work without cell service or wifi, wifi and towers to be used in lieu of no GPS signal. Am I reading correctly?

Yes you are.
Rip
10-21-2008, 03:07 AM
The GPS works, you just can't load the maps to see where you are.
nyc_rock
10-21-2008, 10:44 AM
Calling TomTom, are you there TomTom?
Youngbinks
10-21-2008, 01:12 PM
It seems a bit like a double edged sword. But at least you know you're somewhere once the blue dot appears.
dturner
10-21-2008, 03:22 PM
It seems a bit like a double edged sword. But at least you know you're somewhere once the blue dot appears.
You are never lost, because you are always somewhere.:tounge: