Who invented the first mobile (cell) phones?

a) Grahm Bell

b) Alexander Flemin

c) Martin Cooper

d) Joseph Swan

Martin Cooper, an American Engineer, invented first cell phone in 1973 while working for Motorola company. The name of the first mobile device was Dyna Tac 8000X. It was more than 9 inches long device having weight of more than 1 kg.