GUEST POSTAbove: Amazon's Fire PhoneImage Credit: Mark Sullivan/VentureBeat In 1973, Martin Cooper of Motorola used the earliest handset to make the first cell phone call. Since then, the mobile phone has evolved from a portable telephone to a personal digital assistant to a device for consuming nearly anything. Advancements in mobile technology have changed the type of interactions that phones enable: less human-to-human and more human-to-machine.