Explore the process of creating a VoIP application using React Native in this 30-minute conference talk from React Native EU 2021. Dive into the fundamentals of VoIP technology, WebRTC connections, and the differences between iOS CallKit and Android call handling. Gain insights into the infrastructure requirements for building a production-ready app capable of managing both outgoing and incoming calls. Learn from real-world experience in developing a phone app for sales and support teams. Discover key React Native packages like React Native WebRTC and React Native CallKeep. Cover topics including audio streaming, media session initiation protocols, push notifications, and platform-specific considerations. Perfect for developers looking to understand the complexities of building calling functionality into mobile applications.