Patent ID: 11147010

Abstract:
A method of operating a mobile device to access a voice service available at a cellular network, the mobile device having a cellular network interface for accessing the voice service via a cellular network base station and a non-cellular local area network interface for accessing the voice service via a wireless routing device and a cellular network gateway, the method including connecting to a non-cellular wireless local area network of the wireless routing device; sending a request to the cellular network gateway to access the voice service; receiving a request from a voice service access controller, for any observed wireless local area networks and cellular networks; generating a list of any observed non-cellular wireless local area networks and observed cellular networks; sending said list to the voice service access controller via the non-cellular local area network interface; receiving an identity of one of the listed networks from the voice service access controller, the identified network representing an candidate network for accessing the voice service; and enabling the respective cellular or non-cellular network interface associated with the identified network to access the voice service.