Install the Google Authenticator app from the App Store or Google Play.
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Sign into your Google Account in your browser.Click the dotted menu in the top-right corner of the screen and select Account. Then, choose Security and click 2-Step Verification.
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Click Get started, then enter your password and click Next.
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Under “Add more second steps to verify it's you,” select Authenticator app.
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In the Authenticator app settings on your computer, click Change authenticator app.
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Now go back to the Google Authenticator app on your phone and tap the colorful + button. Then tap Scan a QR code and scan the QR code on your computer screen.
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Enter the Google Authenticator code displayed on your phone onto your computer (or other device), then click Verify.
