The same phenomenon is expected again this year when the exciting new iPhone 8 is projected to convince more iPhone owners than ever before to get a brand new iPhone.
iOS, the operating system that made it into the iPhone and the latest incarnation of which iPhone users have today, is entirely touch-based.
The display is divided between an iPod-like menu system on the top side and a digital click wheel on the bottom.
Today Sonny Dickson posted a video of this feature on an iPhone. On the menu are options such as "Favorites", "SMS", "Music", "Settings" and "Recents", and it's navigated by circling around the click wheel to go up and down, with a center press confirming an action, just like on the iPod. God help them if they wanted to type a text message.
The click-wheel iPhone has always been legend.
As for how we ended up with iOS over this, when the iPhone was still in development in 2005, Steve Jobs was considering two options: modifying and expanding the iPod's software or squeezing OS X into the device. However, he says the images and video are genuine, and there's even an Apple patent that features the click wheel-based OS.
Early prototypes for the iPhone are rarely seen: Apple famously destroys its rejected designs to avoid leaks.
Not much else is known about the device, apart from the fact that it differs heavily from the iPhone we know today, and that very few units running "Acorn OS" exist, with majority likely being destroyed by Apple, a company in which there is a specific job role in relation to the destruction of prototypes. One of the patent figures shown below illustrates the virtual click wheel being used to control the iTunes UI on an iPad.
The touchscreen iPhone we're all familiar with ultimately debuted in 2007.