Bandwidth has introduced a new security feature called Port-Out Passcode Protection to safeguard phone numbers from unauthorized porting and slamming. This self-service feature allows users to add 4-10 character alphanumeric passcodes to their on-net phone numbers, enhancing protection against fraudulent activities. The text highlights scenarios where this additional layer of security can save businesses time and money by preventing unauthorized ports. Bandwidth complies with FCC guidelines for end-user porting but may override a passcode if a valid request is made.