For a new Google Voice number, you do not set up two-factor authentication (2FA) directly on the number itself
. Instead, you enable 2FA on the Google Account that the Voice number is associated with. This protects both your Gmail and Google Voice accounts.
Important security note: Do not use your Google Voice number to receive 2FA verification codes for your Google Account. For the best security, use a physical security key or an authenticator app, since SMS codes can be vulnerable to SIM-swapping attacks.
Step-by-step instructions
- Access your Google Account: Sign in to the Google Account that hosts your Google Voice number.
- Navigate to security settings: Click your profile picture in the top-right corner and select Manage your Google Account. In the left-hand menu, click Security.
- Find 2-Step Verification: Scroll down to the “How you sign in to Google” section and select 2-Step Verification. You may need to enter your password again to confirm your identity.
- Choose your 2FA method: You will be prompted to set up your second verification step. You should set up at least two methods to avoid being locked out.
- Google Prompt (Most common): This is the easiest and most secure option for most users. You will receive a prompt on your phone (if you are signed in) to approve or deny the sign-in attempt.
- Authenticator app (Recommended): Use the Google Authenticator app or another authenticator app to generate a six-digit code on your phone. This is more secure than SMS codes.
- Security key (Strongest security): For the strongest protection, use a physical security key that you plug into your device.
- Backup codes: You can generate and print a list of one-time backup codes to use if your primary method is unavailable. Store these in a safe place.
- Turn on 2-Step Verification: After setting up your preferred methods, click Turn on to activate 2FA for your Google Account and your new Google Voice number.
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