When Apple announced the iPhone in 2007, Steve Jobs called it a “revolutionary product” in a handset category that he said needed to be reinvented.  Now, nearly two decades and 42 models later, the iPhone is one of the world’s most popular phones. Apple has sold over 2.3 billion units of the iPhone and has over 1.5 … Continue reading How the Apple iPhone became one of the best-selling products of all time