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Old 01-26-2008, 11:41 PM
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I don't know a lot about the technology, but I think this is correct.

I have experimentally determined that our phones are, in fact using A-GPS

Indoors, using VisualGPSce, I was seeing 4-5 satellites with a steady fix.

I then turned off the phone (flight mode), and rebooted. I saw 1-2 satellites in and out without obtaining a fix.

Turned the phone on and booted again with service (2 bars). Within a short while, VisualGPSce finds 5 satellites and a fix.

Thus, it seems to me that with the phone on, the cell towers are chiming in, and A-GPS is being used, being able to get a stronger, quicker fix indoors.
 

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