Committee assignment

My committee is I.C.T. We are doing an assignment. We have to do our assignment about the history of something that uses technology. I am doing mine on the history of the telephone, i have found out that Alexandra graham bell invented the telephone because his family members had hearing problems. Alexandra Graham Bell invented the telephone on 1875 in March, i am still trying to find out the exact date it is in march.The cell phone in the old days was so thick it was like a brick. I wouldn't like that in my pocket.