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

beta profile ios 15iPhone 01:38 - How to install the Beta Profile 03:26 - Installing the iOS 15 Update 04:30 - How to downgrade to iOS 14 04:57Using 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