How Do Cell Phones Work?

With worldwide mobile subscriptions estimated to be around 7 billion in 2014, cell phones have become a universal and indispensable tool for modern life. With a cell phone, you can talk to anybody on the planet from almost anywhere. But do you really know how your cell phone works?

In the most basic form, a cell phone is essentially a two-way radio, consisting of a radio transmitter and a radio receiver. When you chat with your friend on your cell phone, your phone converts your voice into an electrical signal, which is then transmitted via radio waves to the nearest cell tower. The network of cell towers then relays the radio wave to your friend’s cell phone, which converts it to an electrical signal and then back to sound again. In the basic form, a cell phone works just like a walkie-talkie.

In additional to the basic function of voice calls, most modern cell phones come with additional functions such as web surfing, taking pictures, playing games, sending text messages and playing music. More sophisticated smart phones can perform similar functions of a portable computer.

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Are US Cell Phone Safety Standards Safe Enough?

Cell phones emit radiofrequency (RF) waves, a type of non-ionizing electromagnetic radiation (commonly called “cell phone radiation”). When a consumer holds or carries a mobile device in close proximity, the user’s head and body can absorb over half of the transmitted energy.

The FCC’s inquiry into radiofrequency (RF) exposure limits and policies has generated broad response, as well as debate. Pong continues to play an active role in this process, weighing in on several topics of concern to users of cellphones and cases.

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