-
Period: to
the equilibrium
-
when the first cellular device was created
AT&T came up with the idea of a mobile phone system in cities in 1971. The idea involves dividing cities into cells. These cells were designed to lessen bandwidth interference.a hufe telly that could only make calls. -
cell phone
Dr. Martin Cooper began working on the first cell phone prototype in 1973. This prototype was the Motorola Dyna-Tac.it was only able to make calls. -
the nokia
The second phone was a nokia.it could call and text. -
da phones
Personal Handy-phone System mobiles and modems used in Japan around 1997–2003. they all could talk and text and surf the web. some even had a few games. -
i phone
the i phone was createde to play games and surf the web. -
i phone 3g
The iPhone 3G is a smartphone designed and marketed by Apple Inc. It is the second generation of iPhone, and was introduced on June 9, 2008 at the Moscone Center, San Francisco. -
i phone 4s
the i phone 4s is the newest phone yet . it can text, it can call, it can download apps you can surf the web it has lots more to.
