Comments on: iPhone 1.1.3 video walkthrough: A-GPS, bookmarks on home screen, more http://jkontherun.com/2007/12/31/iphone-113-vide/ Using mobile devices since they weighed 30 lbs. Tue, 17 Nov 2009 03:28:09 +0000 http://wordpress.com/ hourly 1 By: Jake http://jkontherun.com/2007/12/31/iphone-113-vide/#comment-15295 Jake Mon, 31 Dec 2007 20:55:30 +0000 http://jkontherun.wordpress.com/2007/12/31/iphone-113-vide#comment-15295 <div xmlns="http://www.w3.org/1999/xhtml"><p>Unfortunately the iPhone doesn't offer A-GPS because it doesn't have a GPS chip built in. </p> <p>A-GPS uses data from the mobile network to supplement the data from the GPS signal to find your location faster. This is what an N95 running the latest firmware does to speed up the process of acquiring a satellite lock. The iPhone, on the other hand, is using the mobile network to triangulate your poition relative to the nearest network towers. This explains why it's unable to pinpoint your exact location and can only place your position to within a radius of a couple of hundred metres or so.</p></div>

Unfortunately the iPhone doesn’t offer A-GPS because it doesn’t have a GPS chip built in.

A-GPS uses data from the mobile network to supplement the data from the GPS signal to find your location faster. This is what an N95 running the latest firmware does to speed up the process of acquiring a satellite lock. The iPhone, on the other hand, is using the mobile network to triangulate your poition relative to the nearest network towers. This explains why it’s unable to pinpoint your exact location and can only place your position to within a radius of a couple of hundred metres or so.

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