http://wccftech.com/download-ios-11-beta-8/

Apple has released iOS 11 Beta 8 for download. The update is available over the air for iPhone and iPad users as well as those enrolled in the Apple Developer Program.

It’s pretty obvious at this point that the initial development process of iOS 11 is complete and Apple’s software team is now just focussing on implementing the final touches before final release. Just like iOS 11 Beta 7, iOS 11 Beta 8 is a bug fix and performance enhancing build for developers. This means you should not expect anything new on the features front. However, you should expect a great deal of bug fixes that will enhance your overall experience while interacting with your iPhone or iPad.