From now on, we'll ask you for an a

From now on, we'll ask you for an additional security code when you sign in from any device that isn't recognized. When this happens, just enter the code you received by the mode you selected during set up. If you no longer have your phone or email account, you can always use a backup code to sign in. Learn more about backup codes.

If you change your mind about how you'd like to receive your security code, head over to the Security tab of your My Account page to edit your preferences.