Quick Tips Ask about customer service hours. Make sure these hours reflect the times when people will be calling from overseas to handle any problems. Check the minimum call length and billing increment for calls. Assuming the rates are the same, smaller increments means greater savings. Learn how easy it is to switch the phone number that the service dials when it receives a signal to call the user.
Some services require upfront itineraries and phone numbers.
Receive a sample billing statement to ensure an adequate amount of information is reported. Inquire about the credit policy for poor quality lines. The primary hitch with callback services is that the service needs to know in advance which number it should dial when callers signal that they want to place calls. These days, it is pretty easy to find a carrier offering such services. There are dozens of callback services, with more springing up every day.