GPS Glitch

JFN

Member
Bronze
Jul 12, 2008
273
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18
Nor Cal
#1
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 truly GPS? The error msg was cannot connect to cell service.



John
 

PapaST

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Sep 10, 2007
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#2
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.
 

Saverino

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Gold
Jun 1, 2008
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Burbank
#4
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

Member
Bronze
Jul 12, 2008
273
14
18
Nor Cal
#5
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?
 

Saverino

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Jun 1, 2008
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#7
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.
 

nyc_rock

Member
Bronze
Jul 6, 2007
340
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#9
Calling TomTom, are you there TomTom?
 

Youngbinks

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Jun 4, 2007
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Atlanta, Georgia
#10
It seems a bit like a double edged sword. But at least you know you're somewhere once the blue dot appears.