Cannot Download App to Kindle Fire - The Amazon Appstore is not yet available in your region
When you try to download Apps from your Kindle Fire, you may face with an error like this "The Amazon App store is not yet available in your region". Yes, even for the free of charge applications.
Basically this means that your billing address of your default credit card on your Amazon account is not in the US specifically the 48 contiguous states, Alaska, Hawaii, and the District of Columbia. Once you update your default credit card information on your 1-click payment account, you will be able to download the applications immediately.