On Dec 29, 2011, at 4:23 PM, John Sessoms wrote: > From: Paul Stenquist > >> As far as I know, the GPS is always on, but it's only seen by you >> when the relevant software is being used. Could be wrong abut that, >> but I can't imagine whey the phone would switch it off. > > The GPS on cell phones doesn't really use GPS.
Smart phones use real GPS for navigation and other location functions. > It's based on triangulation from the cell phone towers receiving your signal. > It was put there for enhanced 911 calls - so if you dial 911 but can't talk, > the cops/fire/ems can try to find you. > > It's not perfect, they can only locate you within a block or so. That's why > they always ask where you're calling from when you dial 911 from a cell > phone. But the more towers that can receive your signal, the closer they can > pinpoint your location. > > Any cell phone, even one with the service cut off, can be used to dial 911 > and will connect to the call center nearest to whatever cell tower is nearest > the phone. > > If it's got battery power & it's in the US, it can connect to 911. If you've > got one of those "pay-as-you-go" phones and no minutes, you can use it for > 911. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
