Switching which phone the Authenticator app is associated with will not invalidate any of your existing application-specific passwords, and does not require any backup codes to complete the transition.
An accurate and up-to-date phone number and/or email address is an important step you can take to ensure you never lose access to your account.
Step 3: Click the pencil next to the Authenticator section.
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Most web services that offer two-step verification give you the option to receive a text message or use a special app that provides the six-digit code you need to log in to your account.
Google's Authenticator app works with your Google account, as well as most other services. When using the app as your method of authentication code delivery, you may wonder what happens when you want to retire an old phone for a new one.
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