Invention smart phone

INVENTED BY WHO, WHEN
First smartphones were invented in 1992 by tech
company called IBM. After two years
smarthphones entered the market and sold for
1'100 dollars. In only six months they already sold
about 50'000 of them. Smartphone in that time
was big and unhandy it didn't have long battery
life actually it was known for having very short
battery life.…