How to Set Up Two-Factor Authentication on iPhone

* This post is part of iPhone Life's Tip of the Day newsletter. . *

Different than two-step authentication, two-factor authentication is the latest in Apple ID security from Apple. When two-factor authentication is turned on, even someone who knows your Apple ID password won’t be able to sneak into your account. This is because two-factor authentication requires a confirmation from a trusted Apple device when someone is attempting to sign into your Apple ID account. And you can always turn off two-factor authentication if you don't like it. Here’s how to set up two-factor authentication on iPhone.

Related: 10 iPhone Security Mistakes You're Making and How to Fix Them

From Apple’s website, “When you want to sign into a new device for the first time, you'll need to provide two pieces of information—your password and the six-digit verification code that's automatically displayed on your trusted devices. By entering the code, you're verifying that you trust the new device. Once signed in, you won’t be asked for a verification code on that device again unless you sign out completely, erase the device, or need to change your password for security reasons. When you sign in on the web, you can choose to trust your browser, so you won’t be asked for a verification code the next time you sign in from that computer.

*Two-factor authentication works with iPhones and iPads running iOS 9 or later, as well as Macs running OS El Capitan or later.

To Set Up Two-Factor Authentication on Your iPhone

If you're using iOS 10.3 or later:

  • Open the Settings app.

  • Select your name at the top.

  • Tap Password & Security.

  • Tap Turn on Two-Factor Authentication.

  • Tap Continue.

If you're using iOS 10.2 or earlier:

  • Open the Settings app.

  • Tap iCloud.

  • Tap your Apple ID. Select Password & Security.

  • Tap Turn on Two-Factor Authentication.

  • Tap Continue.

Verify Trusted Number:

  • Regardless of your iOS, your iPhone will then ask you to enter a trusted phone number. I recommend using your iPhone number. You can also choose whether to receive verification via phone call or text message. When you’re done, tap Next.

  • The number you entered will receive a text message with a verification code.

  • Enter the verification code on your iPhone. This will verify your trust phone number and turn on two-factor authentication.

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Author Details

Conner Carey's picture

Author Details

Conner Carey

Conner Carey's writing can be found at She is currently writing a book, creating lots of content, and writing poetry via @conpoet on Instagram. She lives in an RV full-time with her mom, Jan and dog, Jodi as they slow-travel around the country.