Apple’s iPhone is 10 years old

As Apple celebrates 10 years since the introduction of the iPhone, investors and consumers alike are impatiently waiting for Apple’s next big hit.

But it turns out topping the iPhone is no easy task. After all, Apple has sold a billion of the suckers and, in the process, redefined mobile computing and became the world’s most valuable company.

While many jaws dropped when Apple co-founder Steve Jobs debuted the iPhone 10 years ago today, it’s worth remembering that not everyone was sold on the device.

Among the loudest critics, not surprisingly, were the heads of companies that made what were seen as smartphones — until the iPhone leapfrogged them.