Carrier network connectivity is a new feature introduced by Sauce Labs for its Real Device Cloud, allowing customers to connect their private devices to a carrier network for testing scenarios that require real-world conditions. This feature enables users to test mobile app use cases such as sign-in with a call or text message, sending and receiving texts, and more. With this connectivity, developers can simulate real-world interactions and identify issues in their apps before deployment, resulting in better user experiences and fewer crashes. The new feature is designed to provide a more accurate representation of how users interact with mobile apps in the wild.