CTA shared verbally followed by Text Opt-in (Keyword)
Verbal CTA:
Agent: "Before we finish up, just a quick note: To keep you updated, we send messages directly to your phone. If you'd like to receive these updates from [YourLegalCompanyName], just text the keyword OPTIN to [TheKixieNumberofYourChoice]. Remember, you can opt-out at any time by texting STOP. For help, simply text HELP. Standard message and data rates apply, and messaging frequency may vary. Rest assured, your mobile information won't be shared with any third parties for marketing or promotional purposes. If that works for you, I'll be expecting your message. Any questions?"