Block OTA profile (also tvOS 12) has started downloading.
Make sure you open BetaProfiles.com in Safari browser.
You will see the following prompt:
Tap Allow from the popup
Then follow the prompts to install tvOS 12 beta profile in Settings app and restart your device.
After your device has restarted, you will no longer receive any new iOS updates..
BetaProfiles.com is a completely free website, so you can support/donate me through the buttons below. Any donated money will be used for website development purposes.