Any service that is created by using geographical location information as one of the components of the services can be categorized as a location-based service. Location based services are business and consumer 3G services that enable users or machines to find other people or machines, and / or enable others to find users as well as enabling users to identify their locations. Navigation is a good example of a location-based service. Location-based services are especially essential regarding the 3G networks. These services are only interesting in the mobile and wireless networks, and in the beginning it was predicted that location-based services would represent a high proportion of services available in the 3G networks. However, the widespread success of location-based services is still to be seen.