The phrase identifies a situation where the functionality of making and receiving telephone calls over a wireless internet network on a mobile device utilizing the Android operating system is impaired or completely non-functional. An instance of this would be a user attempting to place a call while connected to a home or public Wi-Fi network, only to find the call failing or the feature not activating despite being enabled in the device settings.
The proper function of this feature is important because it allows individuals to maintain communication in areas with poor cellular signal strength, leveraging available wireless internet connections to complete calls. This is beneficial in both residential and commercial settings where cellular coverage may be limited, and it has become increasingly relevant with the proliferation of wireless networks and the increasing reliance on mobile communication. Its origins stem from the desire to improve call quality and accessibility in areas underserved by traditional cellular infrastructure.