By: Briana Henderson & Erin James. Definition of Cell Phones Cell phones: A hand-held mobile...
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Cell Phones(:
What are Cell Phones?
By: Briana Henderson & Erin James
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Definition of Cell Phones
Cell phones: A hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver.
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History of
Cell
Phones/Tim
eline
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History and the Timeline of Cell Phones
Motorola Inc. Patents the “Handie-Talkie”
22 May 1951
This helped aid American Troop communication during the WW II.
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Leonid Kupriyanovich develops the LK-1 Radiophone.
1 Jan 1957
Soviet engineer Leonid Kupriyanovich intrudes the LK-1 Radiophone. The mobile device consists of a handset with a rotary dial and a base station that plugged into existing telephones lines.
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FCC allocates bandwidth space for cellular phone calls
15 July 1968
Under pressure AT&T and Bell Lab., the FCC reconsiders its previous denial of bandwidth for cellular transmissions.
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Dr. Martin Cooper makes first cellular telephone cell.
3 April 1973
Dr. Martin an engineer for Motorola Inc. made a call to rival engineer Joel Engel, the head of research for Bell. This was the first true cellular phone ever.
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Advanced Mobile Phone System introduced in the U.S.A.
1 Jan. 1983
The Advanced Mobile System developed by Bell Labs., is introduced in the U.S. This system was used to separate channels for each individual conversation.
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Finish company Radiolinja launches first 2G network for commercial use.
1 July 1991The Finish telecommunications
company Radiolinja launched the first second generation, 2G, network for commercial use. The increased bandwidth allowed SMS text messages, and ringtones.
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Nokia introduces the first smart phone.
1 August 1996Nokia released the Nokia 9000
Communicator. Attempting to merge Personal Digital Assistant with a phone, Nokia launched the first “smart –phone” feat. A full keyboard and LCD screen.
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Research in Motion releases first Blackberry pager.
1 Jan 1999Canadian based technology company
Research in Motion released the first Blackberry pager in 1999. Though not a phone, the Blackberry 850 pager was the predecessor for future Blackberry models.
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Apple releases the iPhone.9 Jan. 2007
Apple Inc. releases the iPhone. Combining concepts of MP3 player and PDA Smartphone, the iPhone quickly becomes one of Apple’s flagship products.
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TeliaSonera launches first 4G network in Stockholm, Sweden.
14 Dec. 2009TeliaSonera launches first fully 4G
capable service network.
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Types of Cell Phones today.
My Touch 4G
iPhones
Verizon Droids
Blackberry Curves
You have Conventional cell phones , and Smart Phones.
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Pros
Cons
Cell phones are there just in case of Car Accidents, medical conditions, and when your traveling alone can necessitate contacting someone.
Cell phone use while driving can be a big distraction. 25% of car wrecks happen because the user was distracted by cell phone usage.
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Conclusion
Cell phones are a very useful source these days.
I’m very thankful for cells phones. Without them I honestly don’t know
what I would do if they were never invented.
CELL PHONES , CELL PHONES, CELL PHONES!!!!!!!!!!!
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References
www.Cellphones.procon.org www.Thefreedictionary.com www.Timetoast.com www.Consumerreports.com
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The END!!