On Feb 6, 2010, at 11:32 AM, Chad Leigh -- ObjectWerks Inc wrote:
Yes, but this has nothing to do with the question. I am not asking
about using a phone to make a call like 911 even without a plan. I
am asking how the phone can use the cell towers to assist the GPS
without a data plan to get cell tower info from a database somewhere
or something. Using the phone without a plan for voice is an easy
proposition.
Cell towers include coordinate information in their handshake
sequence. If your cell phone shows bars, it has already talked to a
local tower enough to get that information. That's way before the
phone network decides whether you have a voice plan, data plan, or no
plan.
--
Macs R We -- Personal Macintosh Service and Support
in the Wickenburg and far Northwest Valley Areas.
http://macsrwe.com
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