A job description's primary purpose is employee recruitment. The job description alerts potential employees to the job opening and the job's requirements. As a result, the job description meets the company's need to attract qualified employees as defined by the job summary and job functions specified in the description.
in 1947 bell labs made the first cell phone but it took dr cooper of motorola to make a cell phone in 1974 for the government the public use of cell phones began in 1984 your question has two answers the phone was invented in 1889 by bell
The first mobile phones used analog technology. This is pretty much how baked-bean can telephones work too. When you talk on a baked-bean can phone, your voice makes the string vibrate up and down (so fast that you can't see it). The vibrations go up and down like your voice.