21837: Port Order: Incoming Phone Number is already in the porting process with an existing Port OrderPositive FeedbackNegative FeedbackERROR: 21837error-21837 page anchorPositive FeedbackNegative FeedbackPHONE NUMBERSERROR Descriptiondescription page anchorPositive FeedbackNegative FeedbackThe porting phone number is part of a Letter of Authorization that has already been signed.