I'm working on a app with IAP, and want to test IAP before publish. I download Amazon Appstore as the document said, but always got an error said:
"Please check that your billing address and payment method are from a supported country/region".
I'm a developer from China. This is a US amazon account with valid address in New York, although the credit card is from China. I can even buy kindle ebook(paid) from amazon.com, but it doesn't work with Appstore, how can I deal with it?
