The history of mobile phone

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mobile phone english ppt when im freshman

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The history of mobile phone

  1. 1. EE-1-1 V.Bat-Otgon 2008 HUREE ICT UNIVERSITYThe history ofmobile phone
  2. 2. The History of Mobile Phone Design 1946 – Wireless Telephones The first wireless telephone calls were made from cars and trucks. And this is base of mobile phone It was a primitive system and even in a city the size of New York only 12 people could place calls at a time.
  3. 3. The History of Mobile Phone Design First generation 1981 – Portable Units The first portable units were really big and heavy. Called transportables or luggables. They were so large mainly because of the size of the battery. Portable units is bigger than mobile phone.
  4. 4. The History of Mobile Phone Design First generation 1982 – Mobira senator • Nokia introduces their first cellphone,the analog Mobira Senator • Advanced Mobile Phones Service (AMPS) Assigns frequencies in the 824-894 MHz band.
  5. 5. The History of Mobile Phone Design First generation 1983 - DynaTAC 8000X In 1983 Motorola released the first true mobile phone. It weighed about the same as a bag of sugar and had a battery life of only 8 hours. It cost $3,995 and sold over 300,000 units in the first year alone.
  6. 6. The History of Mobile Phone Design Second generation 1989 – GSM Digital Phones In 1989 digital networks lead to the increased use of mobile phones throughout the 90’s. The vast majority of phones were black or dark grey with aerials and small screens. Mongolian Cellphone corporationuse this Global System Mobile (GSM)
  7. 7. The History of Mobile Phone Design Second generation 1993 – CDMA • Code Division Multiple Acces (CDMA) Intorduced for the 800 MHz band. Korea is big intusty country of present CDMA phone.
  8. 8. The History of Mobile Phone Design Second generation Current Design Todays phones come in two different styles the standard and the flip-top phone. The standard matte black plastic finish of the 90’s has been replaced by coloured fascia and stylish metal finishes.
  9. 9. The History of Mobile Phone Design 2.5 generation Convergent Devices The latest trend is to combine many different types of device in one. So mobile phones can also be used as PDAs, MP3 players, games consoles and as devices to surf the internet.
  10. 10. The History of Mobile Phone Design Third generation 3G Next Generation Phones 3G stands for third generation, and is a wireless industry term for a collection of international standards and technologies aimed at increasing efficiency. Increasing data rates will mean that most phones will have cameras and larger screens to enhance the playback of video.
  11. 11. The History of Mobile Phone Design Consumers of cellphone
  12. 12. The History of Mobile Phone Design
  13. 13. The History of Mobile Phone Design Any questions?

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