Here is a neutral and interesting summary of the provided text in one paragraph: To handle incoming phone calls with Twilio Programmable Voice, developers can use Swift Package Manager to set up their Vapor app. They need to install dependencies, including Vapor, and configure their package file to include it. Next, they create a basic "Hello World" application using Vapor's command line tool. To receive calls, they need to initiate ngrok for a publicly accessible URL to their app. Once configured, Twilio sends POST requests to the /call route on the Vapor app, which responds with TwiML telling Twilio to play a sound file over the phone call. The process involves setting up a Twilio account, configuring the ngrok URL, and writing code to handle incoming calls using Swift and Vapor.