How did martin cooper discover the cellphone?

Martin Cooper, an engineer at Motorola, is often credited with inventing the first practical mobile phone. In 1973, he made the first public mobile phone call using a handheld device he developed, the Motorola DynaTAC. Cooper's motivation stemmed from his vision of enabling people to communicate wirelessly, inspired by the communication capabilities depicted in Science Fiction. His groundbreaking work laid the foundation for the modern mobile telecommunications industry.