Do you need to enable Two-Step Verification in order to get Two-Factor Authentication to work?
I am trying to enable Two-Factor Authentication. I have the buttons to do so on all my devices. However, when I try to enable Two-Factor Authentication, I get the following message: "Two-Factor Authentication is not available for your Apple ID at this time". All devices are running iOS 9 and El Capitan.
While trying to troubleshoot, I noticed that when I go to Settings>iCloud>myappleid>Devices (System Preferences>iCloud>Account Details> Devices on Mac), all my devices have a tag that states, "This device cannot be used to receive Apple ID verification codes".
When I go to myappleid.com to manage my ID, there is an option to enable Two-Step Verification. Is this necessary to enable first to get devices to receive verification codes first, so that I can enable Two-Factor Authentication? This does not make sense. I did not come across any documentation that says it is necessary.
I not see anywhere to manage trusted devices on myappleid.com.
Any ideas?