The SS7 Network, or Signaling System No. 7, is a set of protocols used in telecommunications to manage how phone calls and text messages are set up and routed. It enables different network elements, such as switches and databases, to communicate with each other efficiently. This system is crucial for ensuring that calls are connected and that messages are delivered correctly. In addition to call setup, the SS7 Network also supports features like number portability, which allows users to keep their phone numbers when switching carriers. However, its widespread use has raised security concerns, as vulnerabilities can be exploited for unauthorized access to user data and services.