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cellular phones:
about cellular fraud
imei cross-reference table
useful technical terms
world gsm carrier list

Did You Know?

Cellular cloning is a federal crime in the United States of America. Specifically, it is a crime for any person other than a cellphone manufacturer to alter the electronic serial number in a cellphone, regardless of the purpose. In other words, in the USA there is no such thing as "legitimately" cloning a cellphone.

Book 3

My third book is released! Learn what you'll need to know in order to become an embedded engineer.

Book 2

Check out my second book; learn practical stuff about building robots and control systems around Linux PCs and the Atmel AVR.

Book 1

My first book gives you all the intro you need on developing 32-bit embedded systems on a hobbyist budget.

About Cellular Telephones


Welcome! This section of contains a summary of useful information about cellular mobile telephone systems, handsets and services. It is the groundwork for a series of products which I intend to develop for the cellular market; as these products become available, they will be indexed here. Information here, particularly on the definitions page, is also of general interest to people who are curious about cellular technology.

You will find that these pages talk a lot about the GSM digital cellular system. This is partly because the country where I was born and have lived most of my life (Australia) is primarily a GSM country - but a better reason is simply that GSM is the closest thing the world has to a global standardized cellular telephone network. Ground-to-space satellite networks exist (rest in peace, Iridium), but they are expensive and not at all popular at this time. GSM is widely adopted, cheap, and very versatile.

Please select one of the cellular pages available from the menu buttons on the left. Some of the more interesting items available are: and all original content herein is © Copyright 2001 by Lewin A.R.W. Edwards. "" is a trademark protected under U.S. and international law. Infringement or attempted dilution of the intellectual property rights held by Lewin A.R.W. Edwards will be prosecuted to the fullest possible extent.