Error: "The country code and mobile phone number provided is invalid. Please provide a valid number"

This message indicates that you have already used the same mobile number for your primary two-factor authentication method.

To fix this issue, provide an alternate mobile number for setting up your secondary two-factor authentication method. If you do not have an alternate mobile number, you can use an authenticator app for your secondary two-factor authentication method. You can download any free authenticator app such as VIP access, Google Authenticator, and Microsoft Authenticator. On your phone's App Store, search for an authenticator app and install it.

For more information, see FAQ: Two-factor authentication for your account