In 1871, Alexander G. Bell began working on his idea for a telegraph that would transfer human voices through wires. During the years 1873 and 1874, Alexander spent all of his time working on his invention with some help from a few investors.
Alexander recruited the help of Thomas Watson who was very intrigued by Bell's idea of voice transmission. All throughout 1874 and 1875, Bell and Watson worked intensively on Bell's invention. At first, the invention didn't go as smoothly as Bell and Watson had anticipated. It wasn't until March 10, 1876 that Bell and Watson became successful.
When Alexander made the first call on March 10, 1876, to his assistant, Thomas Watson. And the first words spoken on the telephone were, "Mr. Watson--come here--I want to see you."
In 1876, Bell presented the first demonstration of his invention. In 1877, the Bell Telephone company was created. Between the years 1877 and 1886, about 150,000 people owned a telephone. During those years, some significant changes were made to the design of the telephone, which included a microphone designed by Thomas Edison.
There were, however, a few issues with the telephone during its early years. There were a few cases that landed themselves in the Supreme Court, but they never went any further.
Almost forty years after that initial call, in 1915, Bell and his assistant demonstrated the first transcontinental call from New York to San Francisco. Shortly after that, in the 1920s Rotary phones became popular and in every home.
In the 1960s and 70s newer models of the phone kept coming out. There were now touchpad dialing and eventually lead to the invention of the cords free cell phones what we know now.