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ANSWERS: 4
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It's short for "cellular". Each tower that broadcasts/receives a signal is known as a "cell", and the entire network is made up of thousands of "cells" making up the entire system. For example, when you're in Town A, there's a cell tower that serves your phone. As you drive to town B, you may still be on the same phone call, but the signal from town A fades away until you approach the next tower in town B. The signals overlap so you don't lose your call (usually), but as you travel, the signal is broadcast and received from various cells, depending on where you go.
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In Australia we do call them mobile phones.
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Within the wireless network, the Modular Cell provides the air interface to a mobile terminal. A modular cell is the cabinet that houses the equipment needed to transmit data to your phone. (radios, filters, amplifiers, etc...) These cell sites are placed throughout an area to provide overlaping coverage. Your phone transmits your voice in data form to these Modular Cell Sites wich in turn sends it to the main switching center. As you move throughout the area your phone is constantly communicating and handing off from one cell site to the next; depending on wich cell site provides the strongest signal to your location. This continual communication with the cell sites is where the term cell phone comes from.
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In the UK they are called mobile phones as in Aus, Perhaps it's the USA out of sync :-)
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