What are the precursors of the telephone?

Keep practicing — related questions

• What was the first type of mobile phone?
• Who invented Telephone?
• Who invented Telephone?
• The first mobile phone device was invented by_____________
• What is the nickname for a large, obsolete mobile phone?
• Who introduced the First commercial Mobile Phone
• When we want to place a telephone call, the switching equipment of the telephone searches a physical path a...
• When telephone companies first began hiring telephone operators, they chose ..... for the job.