A cellular network or mobile network may be a communication network where the last link is wireless. The network is distributed over land areas called "cells", each served by a minimum of one fixed-location transceiver, but more normally, three cell sites or base transceiver stations. These base stations provide the cell with the network coverage which may be used for transmission of voice, data, and other sorts of content. A cell typically uses a special set of frequencies from neighboring cells, to avoid interference and supply guaranteed service quality within each cell. When joined together, these cells provide radio coverage over a good geographical area. This enables numerous portable transceivers (e.g., mobile phones, tablets, and laptops equipped with mobile broadband modems, pagers, etc.) to speak with one another and with fixed transceivers and telephones anywhere within the network, via base stations, albeit a number of the transceivers are moving through quite one cell during transmission.