| 摘要 |
A method, a combined cellular, PDA communication device and system having specialized software applications for allowing a plurality of combined cellular phone/PDA device users to monitor each other's locations and status and to Initiate cellular phone calls by touching a symbol on a touch screen display which can also include point to call conferencing calling Each participant's cellular phone/PDA device includes a GPS navigation receiver with application software for point to call or conference call initiation to network participants and fixed facilities. The method, device and system also include features that establish public or private peer to peer networks, assign symbols and soft switches associated with the network; create a signal strength geo-referenced contour map; automatically request and download additional constantly updated maps; and collapse the cell phone's soft switch matrix and readout areas after a fixed amount of user inactivity time to increase the map and superimposed symbols area.
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