1. Cell Phones: The Technology Behind Them Clara To and Luka Karginov

2. History - Telephone made by Alexander Graham Bell in 1876 - Radio presented by Gugleilmo Marconi (1894), made by Nikolai Tesla (1880s) - Radio and telephone combined to make cell phone in 1950s - Used to make a wireless phone that still picks up and sends signals via radio waves - First cell phone made by Martin Cooper (1973/ early 1970s)

3. How They Work - Signals transmit to base centers - Base centers find phone using phone number - Call goes through satellites and other towers - Phone always transmits some radio signal to base center - Signal goes to base center nearest to you - Center finds phone using phone number

4. Parts and Functions Circuit board- main part of the cell phone Antenna: internal & external- connection to the cellular network inside the casing of a cell phone; sticks out of the phone Microphone and speaker- allow speech and listening Battery- lifeline runs out => cell phone can't function Other components- optional i.e. internet connector

5. Largest Cell Phone Providers (United States) 1. Verizon Wireless *As of 2011 ratings 2. AT&T 3. Sprint 4. T-Mobile

6. From the Dyna-Tac by Motorola to the iPhone by Apple, cell phones have changed since their creation in 1973. They've become much more portable and have developed more functions over the years. Evolution of Cell Phones

7. The Future of Cell Phones (Predictions) A Holographic phone from the "future". A glass/plastic phone from the "future". People try to make them But the future will still always surprises us

8. Cell phones required In Most coutries Back then: cell phones = a luxury Now: required but extras i.e. internet connector are a luxury. Prediction: in the near future cell phones required with Internet + other extras The need for technology grows fast

9. Sources Pictures http://clandunlop.org/wp-content/uploads/2011/08/mobile-phones.jpg http://img.ibtimes.com/www/data/images/full/2010/04/28/7174-the-at-t-logo-is-seen-at- their-store-in-times-square-in-new-.jpghttp://img.ibtimes.com/www/data/images/full/2010/04/28/7174-the-at-t-logo-is-seen-at- their-store-in-times-square-in-new-.jpg http://images.intomobile.com/wp-content/uploads/2009/09/t-mobile-logo.jpg http://www.talkandroid.com/wp-content/uploads/2011/07/sprint-logo-1.jpg http://www.alldaytech.com/wp-content/uploads/2011/10/verizon-logo.jpg http://blogtecha.files.wordpress.com/2010/04/evolution-phones1.jpg http://the-bulb.com/wp-content/uploads/2011/09/Radio1.jpg http://www.peterme.com/images/dfp_500telephone.jpg http://www.newcellphonesblog.com/wp-content/uploads/2011/04/HP-pre-3-CELL- PHONE-verizon-2-.jpghttp://www.newcellphonesblog.com/wp-content/uploads/2011/04/HP-pre-3-CELL- PHONE-verizon-2-.jpg http://cdn2.fotosearch.com/bthumb/DNV/DNV221/031c0305ll.jpg http://www.huffingtonpost.com/2010/02/05/future-phones-the- coolest_n_450678.html?slidenumber=U%2FnUa%2FZjG4w%3D&slideshow#slide_ima ge

10. Sources cont. Websites "Mobile Phone." Wikipedia, the Free Encyclopedia. Web. 17 Nov. 2011.. Bellis, Mary. "Martin Cooper - History of Cell Phone and Martin Cooper." Inventors. Web. 17 Nov. 2011.. Stonecypher, Lamar. "How Do Cell Phones Work: The Fundamentals Behind Cellular Communication Technology and How It Operates." Find Science & Technology Articles, Education Lesson Plans, Tech Tips, Computer Hardware & Software Reviews, News and More at Bright Hub. Web. 17 Nov. 2011.. "Cell Phone Providers Review." Cell Phone Providers Review 2012 - TopTenREVIEWS. Web. 17 Nov. 2011..

11. http://handcellphone.com/wp- content/themes/green- marinee/phonepic/NokiaVertu- 2.jpg