mobile phone english ppt when im freshman

1. EE-1-1 V.Bat-Otgon 2008 HUREE ICT UNIVERSITY
The history of
mobile phone

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. 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. 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. 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. 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. 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. The History of Mobile Phone Design
Second generation
Current Design
Today's 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finish of the 90’s has been replaced
by coloured fascia and stylish metal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. 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. 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. The History of Mobile Phone Design
Consumers of cellphone

12. The History of Mobile Phone Design

13. The History of Mobile Phone Design
Any questions?