Phones of the past, present and future презентация

Third April nineteen hundred seventy third year, the head of mobile division Motorola Martin Cooper, walking in the middle of Manhattan, decided to call on the mobile phone. The handset is called Dyna-TAC, and looked like a brick, which weighed more than a kilogram, and worked only half an hour of talk time.
last phone

Phones now
Now phones weigh one hundred twenty nine grams. They are very thin, you can talk to them is not limited.
And they are in no way similar to the first phone. They do no even have buttons.