2-step verification (2SV) guarantees that only you can access your account on PlayStation™Network (PSN) and protects you from unwanted logins. Whenever a new login is detected on your PlayStation®4 system, you receive a text message with a verification code to enter after your Sign-In ID and password. It is highly recommended to activate 2-step verification if you are not the only [User] of your PlayStation®4 system.
Make sure you know your account password and sign-in ID before activating 2-step verification and signing out of PSN on all your devices. Learn more on how PlayStation® applies 2-step verification in How 2-Step Verification Works on PlayStation Network.
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