[PW] ? cell phone GPS

[NS]

I think this depends on whether you're talking about GPS or A-GPS.
Here's a quick overview of A-GPS:
http://www.globallocate.com/A-GPS/A-GPS_Frameset.htm

and of course, Wikipedia has an entry, with an explanation of how the
system works: http://en.wikipedia.org/wiki/A-GPS

A-GPS is basically a bare bones locator that really never turns "off"
unless the phone is off or the battery is dead, I think, although
some handsets (like feature-rich smartphones and PDAs) will allow you
to choose whether you want to turn the locator off and go to
"emergency only" mode. 

A-GPS also works without the use of a SIM card; the US uses both GSM
(like AT&T and T-Mobile) and CDMA (like Verizon and Sprint) networks.


Namiko

--- Mary Barna <mbarna at albright.org> wrote:

> This is for me.  I am technically challenged. I know that in your
> cell
> phone is a chip whereby you can be traced through GPS.  I have
> several
> questions, 
> 1. Does this work even if the phone is shut off?
> 2. Does this work if your battery runs down?
> 3. Do you have to turn on the GPS in some way?
> 4. How do "they" find you?
> 
> ******************************************************
> Mary Barna, Director
> Valley Community Library
> 739 River Street
> Peckville, PA  18452
> phone (570) 489-1765  fax (570) 383-9657
> email -- mbarna at albright.org
> webpage -- www.lackawannacountylibrarysystem.org/valley
>  
> ******************************************************
>  
> 
> _______________________________________________
> Project Wombat
> list at project-wombat.org
> http://www.project-wombat.org
> 



       
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