iOS 10 will be released on September 13, but if you’ve signed up to the Apple Beta Software Program, you’ll be able to download it today.
In an e-mail to beta users, Apple wrote, "We are pleased to give you access to the iOS 10 and macOS Sierra final release candidates.
"We will be shipping the final versions to customers worldwide in the coming weeks and appreciate you trying out the releases and providing feedback."
Everyone else doesn’t have long to wait though. iOS 10 will be released on September 13, offering a redesigned lock screen, Siri interactivity with third-party apps, and an improved Photos experience.