- In a premium event, go to Setup -> Registration Form -> Registrant Information.
- Edit the Cell Phone field.
- Mark it as visible for your event registrants.
Now your attendees can register with their cell phone and receive communications from you.
To send messages:
- Go to Promotion -> Registrant SMS.
- Schedule a new delivery.
- Either pick a message you made previously or create a new SMS Message.
- Pick who will receive it and when you want it sent.