Navigate to https://portal.aws.amazon.com/gp/aws/developer/registration/.
- If you see the Billing page, you already have an AWS Account and you're signed in. Nothing else is required.
- If you see the Sign up for AWS page, you have an Amazon account but not a AWS account, skip to number 3.
- Otherwise you'll be prompted to create an Amazon account, start at number 1.
Amazon will call your phone to perform it's verification.