Share AWS End User Messaging SMS resources across multiple AWS accounts

You can now use[ AWS Resource Access Manager](https://aws.amazon.com/ram/) (RAM) to share the following SMS resources: phone numbers, sender IDs, phone pools, and opt-out lists in [AWS End User Messaging](https://aws.amazon.com/end-user-messaging/) SMS, also referred to as [sms-voice](https://docs.aws.amazon.com/pinpoint/latest/apireference%5Fsmsvoicev2/Welcome.html). AWS End User Messaging provides developers with a scalable and cost-effective messaging infrastructure without compromising the safety, security, or results of their communications. AWS RAM is a service that enables AWS customers securely share resources across AWS accounts. With AWS RAM, you can also share resources within organizational units (OUs) in AWS Organizations. Sharing SMS resources in End User Messaging SMS can help you reduce the number of phone numbers your organization requires, saving you the time and cost it takes to register numbers. AWS RAM is a centralized and controlled way to share those resources and provides a step-by-step guide to scope resource policies without requiring you to write them yourself. To learn more and get started, see [here](https://docs.aws.amazon.com/sms-voice/latest/userguide/shared-resources.html).