This feature, available on Android devices, restricts outgoing calls to a pre-defined list of telephone numbers. For example, a parent might enable it on a child’s phone, limiting calls only to family members and emergency services. The functionality utilizes the SIM card’s capabilities to control permitted destinations.
Restricting call destinations provides increased control over phone usage, particularly in situations where limiting communication is desired or necessary. Historically, this functionality found use in corporate settings for specialized devices and has become accessible to a broader user base through mobile operating systems, offering a security measure and controlling communication costs.
