Question

How invented printing press and telephone. And what problem did the inventors face while inventing​

Answer 1

Because of the wide availability of Bibles,the invention of the printing press actually spread the idea of Christianity even further around Europe, and soon to other countries around the world. Also during the Reformation, Printing helped spread Protestant religion ideas such as Lutheranism.

Answer 2

TelePhone - Alexander Graham Bell

Printing Press- Johannes Gutenburg