How to change or reset your iPad's passcode, even if you don't remember what the passcode is

To reset or change your iPad's passcode, you can use the "Passcode" menu in your Settings app, or reset the entire device.
AOL

What's a six-digit verification code — and why you should never share it

What's a verification code, and why are they so important? Six-digit verification codes are a form of two-factor authentication, a process that helps keep your important online accounts secure. For ...
PC Magazine

How to Change Your iPhone or iPad Passcode to Something More Secure

Still using a four-digit passcode? You can beef up your iPhone and iPad security by setting a passcode with six digits or more and even use alphanumeric characters. Here's how. Passcodes used to be ...