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:
1. Backup the iOS device using iTunes. Click here for instructions on how to create an iPhone backup using iTunes.
2. Sign up for the Apple Public Beta Program. Follow these instructions to join the program and enroll your iPhone.
3. Check iOS Software Update to see if beta software for your device is available. Click here for instructions on updating iOS directly from the iPhone.