Archive an iOS backup
Please note that you are about to install beta software. Always back up your data and files before installing beta versions of iOS. We recommend that you do a backup in 3uTools before installing the iOS public beta.
From your iPhone/iPad, go to beta.apple.com/profile or 3uTools to download the configuration profile. Your iOS device will prompt you to install it. Follow the onscreen instructions to allow installation.
Update your iOS device
iOS devices running iOS 8.1.3 or later will automatically receive the latest public beta software over the air. Tap Settings > General > Software Update to install any available beta software.