States government and is subject to change with the United States Department ofDefense civil GPS policy and the Federal Radionavigation Plan. Accuracy can also beaffected by poor satellite geometry. Availability and quality of GPS signals may beaffected by your location, buildings, natural obstacles, and weather conditions. GPSsignals may not be available inside buildings or underground and may be impairedby materials such as concrete and metal.GPS should not be used for precise location measurement, and you should neverrely solely on location data from the GPS receiver and cellular radio networks forpositioning or navigation.The trip meter has limited accuracy, and rounding errors may occur. Accuracy canalso be affected by availability and quality of GPS signals.Different positioning methods can be enabled or disabled in positioning settings.Assisted GPS (A-GPS)Your device also supports Assisted GPS (A-GPS).A-GPS is a network service.Assisted GPS (A-GPS) is used to retrieve assistance data over a packet dataconnection, which assists in calculating the coordinates of your current locationwhen your device is receiving signals from satellites.When you activate A-GPS, your device receives useful satellite information from anassistance data server over the cellular network. With the help of assisted data, yourdevice can obtain the GPS position faster.Your device is preconfigured to use the Nokia A-GPS service, if no service provider-specific A-GPS settings are available. The assistance data is retrieved from the NokiaA-GPS service server only when needed.You must have an internet access point defined in the device to retrieve assistancedata from the Nokia A-GPS service over a packet data connection. To define an accesspoint for A-GPS, select Menu > Applications > Location and Positioning >Positioning server > Access point. Only a packet data internet access point canPositioning (GPS)© 2010 Nokia. All rights reserved. 105
