The cell phone

The cell phone
It called DynaTAC Motorola. It weighs about 1 kilograms. It has a battery life of up to 10 hours but only has a maximum talk time of 35 minutes. It cost 3.500$ (70,000,000 VDN), and of course it only has the basic functions of listening, calling and dialing.
This is not the first cell phone. The first cell phone is Carry phone. As its name, we must carry it but it very heavy – about 5 kilograms.
The person invented it is Martin Cooper. He was born on December 26th 1928 in Chicago. He was an American engineer. Now, he is 89 years old . He is considered the "father of the cell phone"
Who made that wonderful thing?
When and where this phone was invented?
The mobile phone was officially launched on April 3th, 1973 at Motorola company. Then Cooper decided to make one of the first cellular telephone calls to professional rival Joel Engel at Bell Labs.
Functionality of mobile phones

At first, the mobile phone was only used for making calls.
Nowadays, the mobile phone is used daily
Advantages:

Facilitating communication
(long or short distance)
Saves time (in an emergency)
Allows sharing of data (images; videos; songs)
Disadvantages
Requires spending (mobile phone operators)
Health problems (it was proven that some mobile phones emit harmful radiations)
Addiction (the person isolates yourself instead of socializing)
This video is about the cell phone