Unassisted GPS Navigation
A cellular phone with GPS capability allows you know your exact location and provide directions to a desired destination. The difference between unassisted and assisted GPS is that with unassisted GPS, your phone receives location data directly from the satellites and handles all the computations needed to determine phone location. Assisted GPS, which was developed later, involves cellular base stations to provide faster, more accurate location data in the absence of a clear line of sight between the phone and the satellites.
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