You're welcome to One Dev Minute! This series aims to share information in a quickly consumable format, available on the Vonage Dev YouTube channel. To send SMS messages using Cloud Functions for Firebase, you'll need two accounts: one for Firebase and another for the Vonage API. You can sign up for a free Vonage API account and find your API Key and Secret at the top of the dashboard. Create a new project in the Firebase console, choose whether to use Analytics or not, wait for it to create, select the "pay as you go" pricing plan, install Firebase tools, authenticate with Firebase, initialize Cloud Functions, install dependencies, create an environment file with Vonage API variables, and add them to the `index.js` file. Inside the file, set up Firebase, define a webhook function to receive incoming SMS messages, another function for sending response SMS, and release the function. Then, send an SMS message from your phone to a Vonage number, receive a response on your phone, and update the Firebase Real-Time Database with an event. The complete code is available on GitHub.