I came here to say this. It's really a great service, but it is not available for the iPhone (Flash) so I always have to use it on my laptop (trade one problem for another) which is kind of a pain. But I do use it all the time and highly recommended especially to avoid having to cancel subscriptions.

People are surprised when I point it at them because it is almost as if BoA does not want you to use it. Check the right side bar towards the bottom.