This process sets up a workflow where customers must explicitly choose to receive SMS updates, ensuring compliance and valid data collection.
- Go to WooCommerce → SMS Settings.
- Enable the workflow that requires customers to opt in to SMS notifications during checkout.
- Decide whether the opt-in checkbox should be pre-selected or require manual confirmation.
- Customize the opt-in label so customers understand what they are agreeing to.
- Choose where the opt-in option appears on the checkout page.
- If you are using supported providers (such as Vonage or Twilio), enable phone number validation so incorrect numbers are blocked during checkout.
- Save your changes.

The Checkout Experience
In this example, the SMS opt-in option is enabled and the phone number validation is enabled (only available for Twilio and Nexmo) – The customers entered a non valid phone number:

In this example, the SMS opt-in option is enabled and the phone number validation is enabled (only available for Twilio and Nexmo) – The customers entered a valid phone number:
