Everything we know about Apple's next big iPhone update, iOS 9

Next week, Apple will tell us about its next big update for the iPhone and iPad.

Every year at its Worldwide Developer Conference, the company reveals all of the new features its planning to bring to iOS in the fall.

Although Apple hasn't confirmed anything just yet, 9to5Mac's Mark Gurman has spoken to several people familiar with the company's plans for iOS 9. Here are the biggest additions we're expecting to see based on his reports.