Yes, if you want to send SMS/Text Messages to your customers as part of a campaign you must configure Twilio or another communication platform partner, such as Plivo....Yes, we additionally support Plivo for SMS marketing.
Free Plan (Freemium) Limitations
Text messaging / SMS marketing is not available on the free plan....In order to send SMS messages the phone carriers (AT&T, T-Mobile, etc.) require senders to register their company through a process known as 10DLC registration.
Some businesses are more restricted in the type of SMS content allowed, such as SHAFT brands....SMS is still allowed, but as a 'restricted sender.'...If you see the following banner in your SMS designer, your account has restricted sending capabilities....DailyStory facilitates restricted SMS traffic by sending messages as notifications/updates over a registered 10DLC or toll-free number.