Enable Your Apple ID
Create an Apple ID (if you don't already have one).
On iPhone/iPad: Go to Settings > Sign in to your iPhone. Do not have an Apple ID or have forgotten it? and choose Create Apple ID.
On the Mac, navigate to the Apple menu > System Preferences > Apple ID > Create Apple ID.
Online: Visit the Apple ID account page and select Create Your Apple ID.
Sign In (If You Already Have an Apple ID).
On iPhone or iPad, go to Settings > Sign in and input your Apple ID and password.
On Mac, go to System Preferences > Apple ID and sign in.
How to Enable and Unlock Apple ID?
To enable your Apple ID, first determine if you need to establish one or sign in to an existing account. If you don't have an Apple ID, go to Settings on your iPhone or iPad, touch Sign in to your iPhone, and then Don't have an Apple ID or forgot it? Create a new account. To enter your information, simply follow the steps. On a Mac, go to System Preferences, pick Apple ID, and then click Create Apple ID. If you already have an Apple ID, go to Settings (or System Preferences on a Mac), then select Sign in and input your Apple ID and password. If you have difficulty, you can visit the Apple ID account page to reset your password through iforgot.apple.com.