英国的美国领馆:
How to schedule an interview
An appointment for an interview may only be scheduled by calling the Operator Assisted Visa Information Service on 09055-444546 Monday through Friday, between 8.00 am and 8.00 pm, and Saturday, between 9.00 am and 4.00 pm. Calls to this line are charged at £1.30/min from BT landlines, but some mobile and network providers may charge more. In addition, callers from outside the United Kingdom and some mobile and network providers cannot access this number.
An appointment for an interview may only be scheduled through the Operator Assisted Visa Information Service; appointments cannot be scheduled by email. Callers from outside the United Kingdom and some mobile and network providers cannot access this number. In such cases, please have a friend, relative or colleague within the UK dial the call center on your behalf.