To disable SMS functionality in your setup, you'll need to adjust your telephony or messaging platform settings. If you're using Twilio, make sure that SMS capabilities are not enabled on the numbers you're using with Vapi.
Another approach is to configure your assistant to not respond to SMS by adjusting server message settings or disabling SMS-related triggers, depending on your platform's options. This way, you can ensure that your service only handles voice calls, avoiding unwanted SMS responses.
If your telephony platform allows for specific configurations regarding SMS, look for settings to turn off SMS auto-responses or disable SMS completely. This may involve adjusting configurations in your platform's console or dashboard to reflect these changes.
If these settings aren't available directly, check the documentation of your telephony provider for advanced configurations or custom logic settings that may prevent SMS from being processed.