Here are a few tips and steps that will help you download and use the Amazon Application Store on your Android.
Go to www.amazon.com and on the right hand side underneath Shop All Departments click Appstore for Android and App
Then on the right hand side of the Appstore page under Get Started enter your phone number
After open your “Settings” and press “Applications”
Then press “Unknown Sources”
An “Attention” dialog will appear just press “OK”
Open the e-mail or text message
Click on the link provided
Open your notifications and press “Amazon_Appstore.apk”
Then sign in with your Amazon Account and now you are free to download any applications.
Please note that everyday Amazon provides one free application each day for Android users to download.