How to use Amazon App Store for non-U.S. Android users:
1. Register for an e-mail address or use a throw-away account. DO NOT USE your current email address tied to Amazon because entering fake information is grounds to have your account suspended.
2. Register for a new account on Amazon using the disposable email address. Again, DO NOT use your regular Amazon account or email address.
3. Enter information as if you were based in the U.S. Go to http://www.fakenamegenerator.com for help in this regard. Enter the name, address, phone number, and credit card number (Amex, Mastercard, Visa ).
4. Download the Amazon App Store apk to your phone. 
5. Browse the Amazon App Store from your phone! You will not be able to access paid apps, but you can at least get the free apps that are exclusive to Amazon.I’ve double-checked with a staff member based in Europe and it worked, so good luck.