The 4 or 6 digit code that was sent to your mobile was to enter in the box that was part of your account recovery ON LINE. Your mobile number is only used to identify that you are the legit account holder. You cannot reply, or log back in, using your text or phone call facility from a mobile. It is now probably timed out so you will need to go back to the forgotten my password route in Outlook email if you cannot remember it and then when you get the NEW Code(4 or 6 digits) Are you are saying that you have changed your phone and number without telling Outlook?