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In this article, we will discuss "How to Setup AWS Pinpoint SMS Two Way Communication?" . As previously, I already explained the Pinpoint project setup. So I recommend going through the previous article for a better understanding. Enable Two-Way Communication You have to enable two-way communication for each of the numbers separately. I explained in my previous article about requesting a Long Code, Toll-Free, or 10DLC numbers. So go to the "Pinpoint -> SMS and voice -> Phone numbers" screen. Click on the specific number. Scroll down and enable the two-way SMS. After enabling the two-way SMS, you have to add the SNS topic where the user replies received. Create SNS Topic Go to AWS SNS (Simple Notification Service) Console. No need to apply any change in other settings. Add the description if needed then click on the "Create Topic" button. After successfully creating the SNS topic, you are redirected to the next screen. Still, we cannot read the us...