To setup notification for incoming text message navigate to Workspace>Reports>Text Message Activity. Once on that page mouse over the “Actions” menu...

For any incoming text messages you will now see a left facing arrow icon. This icon can be used to reply to these messages. After clicking the arrow icon ...

Please check your daily text limit to see if you are over. Go to Org Name drop down/Account/Text Messaging Activity. Reasons Why Some Messages Don...