Who was the first person to patent the telephone?
In what year did the mobile phone become popular?
How does a landline work?
How does a cellphone work?
The word telephone comes from the Greek language, and it means......
If a signal is sent through the air it uses....
Chose all of the ways the telephone helps our lives.
Chose all of the ways the telephone hurts us.
How big was the first phone book?
What percentage of Americans have cellphones?