How to enable two-factor authentication on Apple ID (IPHONE)

WHAT IS TWO FACTOR AUTHENTICATION?

Two Factor Authentication, also known as 2FA, two step verification or TFA (as an acronym), is an extra layer of security that is known as "multi factor authentication" that requires not only a password and username but also something that only, and only, that user has on them, i.e. a piece of information only they should know or have immediately to hand - such as a physical token.
Using a username and password together with a piece of information that only the user knows makes it harder for potential intruders to gain access and steal that person's personal data or identity.
Procedures:
1. Open Settings and tap on Apple ID option.

2. Go to Password & Security option and tap on Turn on Two-Factor Authentication.

3. on the next prompt, tap on Continue.

4. Make sure that the phone number is correct. If not, enter a new phone number by tapping on Use a Different Number at the bottom of the screen.

5. Now, Choose between Text message and Phone call as a verification method.

6. Tap next to enter the pass-code received.

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