Wireless telephones are devices capable of transmitting and receiving voice and/or data (non-voice) information to and from a network without the use of wires, cables, or other tangible transmission media.  So-called cellular telephones are a common example of wireless phones. 
Wireless telephones and the networks by which they communicate operate according to various technologies, including analog mobile phone service (AMPS), circuit switching, packet switching, wireless local area network (WLAN) protocols such as IEEE 802.11 compliant networks, wireless wide-area networks (WWAN), short-range RF systems such as Bluetooth, code division multiple access (CDMA), time division multiple access (TDMA), frequency-division multiplexing (FDM), spread-spectrum, global system for mobile communications (GSM), high-speed circuit-switched data (HCSD), general packet radio system (GPRS), enhanced data GSM environment (EDGE), and universal mobile telecommunications service (UMTS).  Of course, these are only examples, and other technologies may be employed in wireless communication as well. 
Herein, the term ‘wireless device’ is meant to include wireless telephones (including cellular, mobile, and satellite telephones), and also to include a variety of other wireless devices, including wireless web-access telephones, automobile, laptop, and desktop computers that communicate wirelessly, and wireless personal digital assistants (PDAs).  In general, the term ‘wireless device’ refers to any device with wireless communication capabilities. 
Many companies produce wireless telephones and other wireless devices.  Among the more well-known producers are Nokia®, Ericsson®, Motorola®, Panasonic®, Palm® Computer, and Handspring®.  A variety of producers also provide wireless devices comprising versions of the Microsoft® Windows® operating software. 
A network that serves wireless devices may provide a location service.  For example, mapAMobile provides such a service in the United Kingdom.  The location service may make it possible to geographically locate wireless devices that interact with the network.  For example, the network may identify the location of a caller's wireless device (e.g. “Gilman Street in Redmond, Wash.”) and provide this location information to a called party's wireless device.  However, due to constraints in the amount of data that may be communicated during an arriving call, it remains a challenge to provide location information to wireless devices in a manner that is both timely and detailed.