Using the following setup and implementation, we can send SMS notification using Salesforce Flow.

In the following implementation, I have used a custom object.

Messaging Channel is needed. It’s not a free feature. Digital Engagement Messaging license is needed to get Messaging Channel.

Steps:

1. Create a Messaging Template.

2. Create a Flow. Use Message Notification Flow Element to send the SMS Message.

Messaging Channel Unique Name is the Developer Name of the Messaging Channel.

Messaging Template Unique Name should be the Developer Name of the Messaging Template.

Note:

1. Messaging channel requires Digital Engagement Licenses.

2. Phone_Number__c is custom Phone data type field on the Custom Object.

If the SMS Messages are not sent, please check the Messaging Templates Error Log in Setup.