How do I uninstall ios12 beta?

To remove it, open the Settings app, tap General, and scroll down to Profiles.

Tap Profiles, and you’ll see your beta profile there.

Tap Delete Profile to remove it.

Tap here, then restart.

How do I remove the beta software from my iPhone?

Leave the iOS 12 Beta Program

• Grab your iPhone or iPad that’s already configured for the iOS beta program and head to Settings > General.
• Swipe down to find and select Profile.
• Tap the iOS 12 Beta Software Profile.
• Select Remove Profile.
• Select Remove to verify.
• Enter your iOS passcode to confirm the change.