The question of who invented the telephone in not be the name of a single person. Many of the debates around who invented the telephone involve the names of Antonio Meucci, Elisha Gray and Alexander Graham. But in recent years I have also discovered the work of Dr. David Alter who was also a pioneer in telephone technology.

Check out the answers below for a bit more details on the evolution of the telephone.

https://www.quora.com/Who-invented-the-telephone/answer/Tom-Peracchio

https://www.quora.com/Why-does-no-one-ever-remember-that-the-telephone-technology-was-invented-by-Antonio-Meucci/answer/Tom-Peracchio

https://www.quora.com/Did-Alexander-Graham-Bell-steal-the-idea-for-a-working-telephone-from-Elisha-Gray/answer/Tom-Peracchio

https://www.quora.com/When-was-the-very-first-telephone-created