Select "Security" from the dropdown.
Click "2-Step Verification".
Select "Restore 2-step Verification Devices".
Note: "Restore 2-step Verification Devices" option is only available if you registered at least one 2-Step Verification method in the past and then disabled the 2-Step Verification for your account.
Select devices and click "Restore".
Important: Only restore devices and methods you still have access to.
Click "Restore" restore to confirm.
2-Step Verification method(s) have been successfully restored.