1. On your dashboard, click on "API & Forms"
2. Click on "Manage your forms"
3. Click on "Create a new unsubscription form"
4. Choose "Collect SMS only"
5. Customize your unsubscription form
You may customize the opt-out form to meet your needs by selecting preferred colors, updating form text content, and customizing the confirmation message shown after the form is submitted.
6. Once completed, click on "Save" and then go "Back"
7. On the right side of your screen, click on the small "Share" icon and copy the form link provided
8. Copy and paste the URL into your SMS campaigns
Now, your subscribers may opt out automatically whenever needed.