Use Or Monitor the iOS 11 Update
Nothing is confirmed but unless Apple drastically changes how it operates, you can expect the iPhone 8 to be powered by Apple's iOS 11 operating system.
You don't have to wait for the iPhone 8 launch to get a feel for the iPhone 8's software. You can try it right now via the company's iOS 11 beta.
Apple's released a pre-release version of iOS 11 for select iPhone and iPad models. The iOS 11 beta isn't finished but it includes many of the features and other changes coming to the iPhone in the fall.
We highly recommend getting familiar with iOS 11 ahead of the iPhone 8 launch. This way, you'll know how everything works and where everything is when you fire up your new iPhone for the first time.
To do this, some of you might want to load the iOS 11 beta up on an iPhone. Others might be better off monitoring the iOS 11 beta from a distance.