To prevent a user from receiving any SMS's please follow the steps below.
It's worth understanding that they will not receiving any SMS's whatsoever this includes marketing and transactional SMS's (including important e-Tickets or Event surveys), which may impact the event arrival experience.
- Navigate to the Person record
- Select Advanced
- Set Yes to Unsubscribe from SMS
- Press Save
Note: you can resubscribe them at anytime by changing this value to Yes.