The ability to disable voice calls over a wireless network on Android devices allows users to manage their call preferences, especially when network conditions are variable or cellular service is preferred. This function reroutes calls over the cellular network instead of using the active Wi-Fi connection.
Disabling this feature can be important when Wi-Fi signal strength is weak, leading to poor call quality. It can also prevent unexpected data usage charges if a Wi-Fi network has limited bandwidth or associated fees. Historically, this functionality evolved as mobile network technology advanced, providing users with greater control over their calling experience.