Reliable cellular networks make widespread use of mobile technology possible. The first cellular network was established in Chicago, Illinois, in 1983.
Photograph courtesy National Geographic
ability to use.
reasonably priced, not expensive.
ready for use.
sale of goods and services, or a place where such sales take place.
geographic region served by at least one cell tower, or radio transceiver.
place, usually a tall mast, where electronic communications equipment are placed to create and service a single cell in a cellular network.
connected series of cells, or geographic areas served by at least one cell tower, used for wireless communications.
sharing of information and ideas.
area reached by a communications network.
nations with low per-capita income, little infrastructure, and a small middle class.
unique or identifiable.
to form or officially organize.
rate of occurrence, or the number of things happening in a specific area over specific time period.
having to do with places and the relationships between people and their environments.
condition of an organism's body and mind.
cable or wire connecting two ground locations.
tools that are not dependent on a fixed location or set of machinery.
to control or manage.
taking part in an activity.
wireless transmission based on electromagnetic waves.
to get or accept.
any area on Earth with one or more common characteristics. Regions are the basic units of geography.
dependable or consistent.
device that can both transmit and receive signals.
to pass along information or communicate.
affecting a large area or community.