1. Cell Phones Marcella Maruca

2. What is It? a short-range, portable electronic device used for mobile voice or data communication over a network of specialized base stations known as cell sites

3. Accessories • SMS (Short Message Service) is used for text messaging • Email • Packet Switching is used for access to the internet • Camera and Video Recorder • MMS (Multimedia Messaging Service) for sending and receiving pictures

4. Inside the Cell Phones • The circuit board • The microprocessor • An antenna • A liquid crystal display (LCD) • A keyboard • A microphone • A speaker • A battery

5. The front of the circuit board • The microprocessor • The back of the circuit board • The display and keypad contents • The cell-phone speaker, microphone and battery backup

6. Disadvantages • Non-repairable internal corrosion of parts results if you get the phone wet or use wet hands to push the buttons. • Extreme heat in a car can damage the battery or the cell-phone electronics. • Extreme cold may cause a momentary loss of the screen display.

7. Advantages • Communicate with others wherever we are • Help us with organize our daily plans • Entertainment with phone games, WAP and SMS games • Share photos with friends • Check emails and use it as a business tool

8. Cell Phone Models MOTOROLA KRZR LG RUMOR BLACKBERRY PEARL SAMSUNG G600

9. Cell Phone Service Companies

10. How Far We’ve Come Cell phone technology has come a long a way and is still growing. Compared to the first cell phone, modern cell phones are smaller, more advanced and more reliable. Cell phones used to be the size of a normal house telephone but now they can fit in the palm of our hands. The only people that had cell phones when they first came out were business men but now almost every person in the United States h-as one.

11. Before and After (left) THEN Motorola’s first cell phone (right) NOW Palm Treo

12. Bibliography • http://electronics.howstuffworks.com/cell-phone.htm • http://electronics.howstuffworks.com/cell-phone6.htm • http://electronics.howstuffworks.com/cell-phone11.htm • http://www.sciaga.pl/tekst/19697-20-advantages_and_disadvantages_of_using_a_cell_phone