http://mobile.engadget.com/2008/08/08/your-iphone-probably-isnt-calling-home-just-might-not-want-you/ Engadget Mobile Comments for Your iPhone probably isn't calling home, just might not want you up in its Core Location http://mobile.engadget.com/media/feedlogo.gif http://mobile.engadget.com en-us Copyright 2009 Weblogs, Inc. The contents of this feed are available for non-commercial use only. Blogsmith http://www.blogsmith.com/http://mobile.engadget.com/2008/08/08/your-iphone-probably-isnt-calling-home-just-might-not-want-you/http://mobile.engadget.com/2008/08/08/your-iphone-probably-isnt-calling-home-just-might-not-want-you/
There are 3 ways to locate yourself on iphone OS: cell tower triangulation, wifi, and GPS.

What makes it tricker is the GPS is A-GPS so it MAY be using some information from cell towers (time, location) to help the GPS chip.

The GPS chip is off 90% of the time to save battery life. So MOST of the time, you are using cell tower/wifi information to start off.

But the cell tower information comes from Google -- they bring their own database. And wifi comes from skyhook.

This may be the problem with Nav software as well -- data coming from CoreLocation contains Google information, and you can't filter it out to allow 3rd party nav apps. Yet.

It is a clever hack that saves battery life, but I can see why Google isn't easier to allow TomTom, Garmin, etc to share in that information to build nav apps.]]>Aug 8th 2008 11:08AMhttp://mobile.engadget.com/2008/08/08/your-iphone-probably-isnt-calling-home-just-might-not-want-you/http://mobile.engadget.com/2008/08/08/your-iphone-probably-isnt-calling-home-just-might-not-want-you/Apple can inspect the software you have, they even can get your privacy
it's stupid to open "back door"]]>Aug 8th 2008 4:42PMhttp://mobile.engadget.com/2008/08/08/your-iphone-probably-isnt-calling-home-just-might-not-want-you/http://mobile.engadget.com/2008/08/08/your-iphone-probably-isnt-calling-home-just-might-not-want-you/Aug 9th 2008 8:37AM