Samsung SWC-R640LBAXAR - Manual (Page 204)

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GPS & AGPS
Certain Samsung mobile devices can use a Global Positioning System
(GPS) signal for location-based applications. A GPS uses satellites
controlled by the U.S. Government that are subject to changes
implemented in accordance with the Department of Defense policy
and the 2008 Federal Radio navigation Plan (FRP). Changes may
affect the performance of location-based technology on your mobile
device.
Certain Samsung mobile devices can also use an Assisted Global
Positioning System (AGPS), which obtains information from the
cellular network to improve GPS performance. AGPS uses your
wireless service provider's network and therefore airtime, data
charges, and/or additional charges may apply in accordance with
your service plan. Contact your wireless service provider for details.
Your Location
Location-based information includes information that can be used to
determine the approximate location of a mobile device. Mobile
devices which are connected to a wireless network transmit location-
based information. Additionally, if you use applications that require
location-based information (e.g. driving directions), such applications
transmit location-based information. The location-based information
may be shared with third-parties, including your wireless service
provider, applications providers, Samsung, and other third-parties
providing services.