If you forget your iOS passcode and try typing it incorrectly too many times you will be locked out for 30 minutes. If you don’t actually know the passcode then you can be locked out indefinitely!
Luckily there’s an easy fix for most devices. The one we’re looking at in this particular video is for iOS8 or 7 and is a particularly easy strategy. Note that you might need to enter a password still to use iCloud. The moral of the story? Keep your passwords safe!