Patent ID: 8204542

Claim:
A communication apparatus having a first subscriber identity card camping on a first cell belonging to a first wireless network via a radio transceiver module, and a second subscriber identity card camping on a second cell belonging to a second wireless network via the same radio transceiver module as that in use for the first subscriber identity card or via a different radio transceiver module, the communication apparatus comprising: a memory device storing information indicating at least one discount period of the first wireless network and at least one discount period of the second wireless network; and a processor coupled to the first subscriber identity card, the second subscriber identity card and the memory device, receiving an apparatus originated communication request with a destination address, determining whether a current time falls within the discount period of the first wireless network or the discount period of the second wireless network, and establishing a wireless communication with a peer device of the received destination address through one of the first cell and the second cell in response to the fallen discount period.