Appel today has seeded public beta testers with the fourth build of iOS 11 for debugging on the iPhone, iPad, and iPod touch. This comes a day after the fifth developer build was released.
To install the new build, head over to Settings > General > Software Update. Tap “Download and install” next to the iOS 11 Public Beta 4 listing and you’ll be good to go. I recommend jumping on a Wi-Fi network first alongside plugging in your device beforehand as a) you don’t want data overcharges on your bill and b) you don’t want your phone or tablet to die during the installation process.
iOS 11 packs a revamped Control Center, redesigned notifications, improvements to Siri including an all-new voice, Do Not Disturb While Driving, and an all-new interface for the iPad with better productivity features, a macOS-style Dock, and a new multitasking view. There’s even an official Files app for all iOS devices that lets you access files stored on your device without having to hunt down a third-party service to do so.