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Our online glossary is here to help you make sense of the terminology used in the cell phone industry. It covers mobile technologies, such as 3G and 4G, and even includes a bit of information on smartphone operating systems and the companies that make the cell phones and other mobile technology devices we all use.

What is "modem"?

A modem is a device that lets equipment like personal computers send and receive data to and from another device on the remote end of a modem connection. In most cases these days a modem is used to connect a computer to the internet. Modems get their name from what they do, modulate and demodulate signals, thus "mod" "dem". Modems can be used over normal wired connections like phone lines as well as over wireless connections like those offered by cell phone networks.

Referred to by: tethering

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