- On your mobile phone, use a browser (better with Chrome), go to Amazon.com
- Make sure you are signed out first
- Copy and paste this "link" to your current browser
- Go to the link and "We're sorry" page comes up.
- Scroll to the bottom and click "Already a customer? Sign In"
- Sign in
- "GET $10 OFF AT AMAZON.COM" page comes up
- Click "Change your 1-click setting"
- If you already register master card in your account, you will get credit. Otherwise, put mastercard info.