I’m eligible for the free usage tier, but I received a charge. Why?

AWS’s free usage tier is available to new AWS accounts created on or after October 21, 2010. The free tier applies to certain participating AWS services up to a specific maximum amount of usage each month—applicable services and usage amounts are defined above and at aws.amazon.com/free. When an account goes over a free tier of usage, the standard AWS service rates will be billed to your credit card.

If you have not exceeded the usage tiers, you may have been charged for related services that are not covered under the free tier. Some examples include: ******if you are running an Amazon EC2 m1.small instance rather than a t1.micro instance, if you are using a SUSE Linux instance rather than an Amazon EC2 Linux instance******, or if you are using a service not included in the offer, such as Amazon RDS. To review your AWS usage activity, log into your Account Activity page and download Usage Reports at aws.amazon.com/account-activity.