1) Martin Cooper, an engineer at Motorola, made the first public call on a mobile phone 40 years ago, choosing to call his rival who was also working on the technology. 2) Early mobile phones had limited capabilities, able to hold only 99 phone numbers, but cameras and internet browsing were introduced in 2002. 3) The iPhone launched in 2007 combined the functions of a mobile phone, iPod, and internet communication device and was revolutionary for being entirely touchscreen controlled.