@thisismoney: It’s now a £1 trillion global industry – but the mobile phone started with one slightly cheeky call ☎️ In 1973, Martin Cooper stepped onto a New York street and rang a rival engineer to prove his new invention worked 🗽 On the call he famously told him: “I’m calling you from a cellphone… a real, handheld, portable cellphone.”📱 That moment helped launch the smartphone revolution that now shapes how billions of people communicate every day.