Martin Cooper, an engineer at Motorola, is credited with inventing the first handheld mobile phone in 1973 ¹ ² ³. Cooper made the first public call from a handheld mobile phone on April 3, 1973, calling a rival telecommunications company to declare that he was calling from a cell phone. The device weighed 2.5 pounds and had a 30-minute battery life ¹ ² ³.