From your dashboard, click on your profile:
Then select Settings:
Can clients respond to the phone number they receive the SMS notification from?
The phone number used to send SMS notifications is read-only, so can only be used to send notifications.
*NOTE - By default, all other notifications sent by the photographer are turned on. This may include Appointment Confirmations, Schedule Changes, Getting Ready Guides, and other notifications controlled by the Photographer. While not recommended, you can opt out of all SMS communications by unsubscribing through a texted message.
Agent unsubscribed now wants to receive SMS notifications again?
To re-enable SMS, the user needs to send "START" to +1 614-665-8461, and they should be resubscribed.