Can you use a cell phone as a credit card?

Nokia revealed the first fully integrated mobile-payment cell phone, or NFC phone in 2007. Learn about NFC technology and mobile payment trials around the globe.

How Cell Phones Work

Cell phones have completely changed the way we communicate with one another. These days, they're as common as keys; and with coverage plans extending as far as the eye can see, millions of people are never out of touch.

How Cell-phone Jammers Work

Cell phones are basically handheld two-way radios. With cell-phone etiquette at an all-time low, some people are exploiting the vulnerability of the radio spectrum to silence blabbering offenders. Find out how.

How Cell-phone Radiation Works

For years now, we've heard conflicting reports about cell-phone radiation ... and the debate goes on. Find out what the buzz is about and how to protect yourself when choosing and using a cell phone.

How Cell-phone Viruses Work

Although they can't do much damage at present, in the future cell-phone viruses may be as debilitating as computer viruses. Learn how cell-phone viruses spread, what they can do, and how you can protect your phone.

How GPS Phones Work

With the right software or service package, a GPS phone can pinpoint your location, give directions to your destination and provide information about nearby businesses. Find out how a GPS phone works.

How Ringtones Work

If the clothes make the man, then the ringtone makes the phone! Find out how a cell phone produces a tune and how you can download (or even create) your own.

How the Google Phone Will Work

Rumor and speculation are running rampant about the Google Phone -- a device that may or not be in production and could have all the bells and whistles of a state-of-the-art cell phone crossed with key Google applications.

How the iPhone Works

Almost a year after its release, the iPhone is still sparking controversy. Is it really all that innovative? More importantly, is it worth $400?

How TV Phones Work

Widespread mobile television has been a long time coming. TV-enabled cell phones have been available in Korea since 2002, but the real "mobile TV revolution" is only beginning, as telecom companies release DTV-enabled phones and rush to build the broadcast networks to deliver the corresponding content.

I've noticed that I am not allowed to use my cell phone in airplanes or in hospitals. Why are these prohibitions in place?

You're probably well-aware of the restrictions related to cell phone and laptop use on airplanes. But do you know exactly why they're in place?

Inside a Cell Phone

On a "complexity per cubic inch" scale, cell phones are some of the most intricate devices people play with on a daily basis. Take a look inside a cell phone.

What does GSM mean in a cell phone?

The most useful thing to know about the Global System for Mobile communications (GSM) is that it is an international standard. If you travel in Europe and many other parts of the world, GSM is the only type of cellular service available.

What is the Apple iPhone?

The renowned iPhone was once just a rumor. Learn why the iPhone was expected to change the industry.

What is the difference between analog and digital cell phones?

There are two popular digital systems in the United States. One is generically known as "digital service," and the other is clearly branded as "PCS."