Once installed, public beta versions of iOS and OS X have a built-in Feedback Assistant app. The Feedback Assistant can be found on the iOS home screen. Simply open the app and follow the instructions to submit comments directly to Apple.
Beta Software Program
Downgrading to a previous version of iOS will unenroll the iPhone from the Apple Beta Software Program.
1. Put the iPhone in Recovery Mode. Click here for instructions on how to enter Recovery Mode.
2. Click the Restore button in iTunes and allow the restore process to wipe the device.
Individual devices can be unenrolled from the Apple Beta Software Program at any time. To remove an iPhone from the program a non-beta version of iOS must be installed on the device. Click here for instructions on how to downgrade from iOS public beta.
Apple customers with a compatible iOS device or Mac can test public beta releases of new software by joining the Apple Beta Software Program. Sign up is free and requires an Apple ID.
Open the Apple Beta Software Program page in your browser and click the blue "Sign up" button to start.
Participants in the Apple Beta Software Program can test future versions of iOS and send feedback to Apple. When a new beta version becomes available, it can be installed on an enrolled device. Here are the steps needed to install beta software on the iPhone: