How does the RilNotifier application Android work to send notifications?

The RilNotifier application on Android is a system app that operates in the background to send notifications about network and mobile service status. It alerts users to changes in network connections, such as switching between 3G, 4G, or 5G, as well as issues like poor signal strength or roaming charges. Integrated with the Radio Interface Layer (RIL), the app ensures users stay informed about their mobile service without needing to interact with it directly. While typically not noticeable, RilNotifier plays a crucial role in maintaining seamless connectivity and providing real-time updates.