What do I do if my iPhone says virus detected?

Here’s how to restore your iOS device from a backup:

1. Select the Settings icon on your home screen.
2. Select General.
3. Select Reset.
4. Select Erase all Content and Settings.
5. Choose between Backup Then Erase and Erase Now depending on what you want to do (pop-ups will ask you to confirm the action and enter your password)