Classic: Enabling Follow Up SMS
Click All Tabs link (the + sign)
Go to Configuration Center tab
Click the SMS/Text Tab
Click Enable Follow Up SMS
Edit the SMS Follow Up Text
Click Save SMS Config
On a contact, check SMS Follow Up
Click All Tabs link (the + sign)
Go to Configuration Center tab
Click the SMS/Text Tab
Click Enable Follow Up SMS
Edit the SMS Follow Up Text
Click Save SMS Config
On a contact, check SMS Follow Up