You're stranded on a deserted island with only your computer and WiFi, but you've got FastAPI and the Vonage Messages API to help you send an SMS to someone. You install FastAPI, create a virtual environment, and write a simple web application that sends an SMS using the Vonage API. The application allows users to enter a phone number and send an SMS with a predefined message. After successfully sending the SMS, the application displays a success message with the sent number. With this tutorial, you've learned how to build a simple FastAPI application that integrates with the Vonage Messages API to send SMS messages.