146If your mobile device has a touch-screen display, pleasenote that a touch-screen responds best to a light touchfrom the pad of your finger or a non-metallic stylus. Usingexcessive force or a metallic object when pressing on thetouch-screen may damage the tempered glass surfaceand void the warranty. For more information, refer to“Standard Limited Warranty” on page 155.GPS & AGPSCertain Samsung mobile devices can use a Global PositioningSystem (GPS) signal for location-based applications. A GPS usessatellites controlled by the U.S. Government that are subject tochanges implemented in accordance with the Department ofDefense policy and the 2008 Federal Radio navigation Plan (FRP).Changes may affect the performance of location-basedtechnology on your mobile device.Certain Samsung mobile devices can also use an Assisted GlobalPositioning System (AGPS), which obtains information from thecellular network to improve GPS performance. AGPS uses yourwireless service provider's network and therefore airtime, datacharges, and/or additional charges may apply in accordance withyour service plan. Contact your wireless service provider fordetails.Your LocationLocation-based information includes information that can beused to determine the approximate location of a mobile device.Mobile devices which are connected to a wireless networktransmit location-based information. Additionally, if you useapplications that require location-based information (e.g. drivingdirections), such applications transmit location-basedinformation. The location-based information may be shared withthird-parties, including your wireless service provider,applications providers, Samsung, and other third-partiesproviding services.Use of AGPS in Emergency CallsWhen you make an emergency call, the cellular network mayactivate AGPS technology in your mobile device to tell theemergency responders your approximate location.AGPS has limitations and might not work in your area. Therefore:• Always tell the emergency responder your location to the best of yourability; and• Remain on the mobile device for as long as the emergency responderinstructs you.NavigationMaps, directions, and other navigation data may containinaccurate or incomplete data, and circumstances can and do