Spring 2010 Issue

How a Cell Phone Works

By Samantha Lewis

I'm sure you've heard of an iphone, a blackberry, and even a motorola razor. My point is, cell phones are used everywhere-by teenagers, adults, everybody! The use of cell phones is world-wide, (thery are used very often) A mobile phone is an electronic device used for long-range voice and data communications. Mobile phone features include the telephone, text messaging, email, gaming the internet-there's so many options.

The history of cell phones goes back all the way to 1973, when a man named Martin Cooper (now chairman, CEO, and co-founder of ArrayComm Inc.) made the first call on a cell phone. The cell phone, (also known as "the brick" was 30 ounces! Motorola introduced the "DynaTAC" phone into commercial buisness in 1983, this phone was 16 ounces. It was also $3,500. What an expensive phone!

	The parts of a cell phone are somewhat complex. For all you viewers who like to experiment with parts, here is a list of the main cell phone parts. battery housing controls, buttons/ keypad cables and sockets (headset socket) case volume control bluetooth enabler microchip called a Subscriber Identity Module (SIM) card.

SIM card gives indentity to a mobile phone and allows indivuals to keep all their personal information on a chip, so that they can switch phones while maintaining their personal information.

The colume control allows individuals to enable or disable sound, make the sound higher, or lower.

The Bluetooth enabler allows individuals to hook up a Bluetooth device to their mobile phone.

The headset socker allows a cabel/cord attached to a headset or earphones to be pluggged in.

The battery provides energy for the phone to work. Most of the time, it is rechargeable.

Ever wondered how a cell phone works? Well that depends on what type of cell phone it isMobile Phones have the combination of a radio technology and a cell phone technology.

The SIM fits into the cell phone and gets connected with a set of circuts built inside the cell phone. It is the SIM that completes the cicuitry inside and once SIM is inserted inside the cell phone, the circuit inside the mobile phone is complete and it starts receiving signals and we are able to talk. One may insert a SIM from and GSM inside the mobile phone is complete and it starts recieving signals and we are able to talk.

One may insert a SIM from any GSM (Global System for Mobile communications) service provider and the phone gets connected to that particular network. CDMA (Code division multiple access). Mobile Cell Phones have built-in SIM downside/Modifications

Ever wondered how cell phones work? What the the history is? How the SIM card works, or what it does? Ever wondered anything about a cell phone at all? Well know you know!