Question: What happens to the old password if a User Equipment (UE) user attempts to change it to a new password but enters an incorrect old password during the Registration of new password procedure for Supplementary Services?
Option 1: The old password is automatically updated to a default password.
Option 2: The old password remains unchanged until successfully changed by correctly repeating the procedure.
Option 3: The UE permanently locks out the user from changing passwords after one incorrect attempt.
Option 4: The UE requires an additional authentication step before allowing another password change attempt.
Explanation: This is because the correct handling of an incorrect old password entry during a password change procedure, as per telecom security practices, should not automatically alter the existing password (to maintain security) nor should it lead to permanent lockout or additional authentication steps without prior warning. The UE's response to indicate the request's failure and the requirement for a successful repeat attempt aligns with secure password management principles in telecommunications.