How can I install iOS 15 and above as a beta profile on iPhone 6?

beta profile ios 15Help make the next releases of iOS, iPadOS, macOS, tvOS, watchOS and HomePod software our best yet. As a member of the Apple Beta Software Program, you can take part in shapingUsing your iPhone, go to Apple's Beta Software site, click iOS 15, and follow the instructions to enroll your device. Then, go to the download page and load the confuration