Methods for handling an apparatus terminated communication request and communication apparatuses utilizing the same

A communication apparatus having a first radio transceiver module, a second radio transceiver module, a first subscriber identity card with a first address camping on a first cell belonging to a first wireless network via the first radio transceiver module, and a second subscriber identity card with a second address camping on a second cell belonging to a second wireless network via the second radio transceiver module, comprising:

• a processor coupled to the first radio transceiver module, the second radio transceiver module, the first subscriber identity card and the second subscriber identity card, determining whether a first communication status of the first subscriber identity card has reached a first limitation, determining whether a second communication status of the second subscriber identity card has reached a second limitation, and determining whether to activate a service instructing the first wireless network to transfer a first apparatus terminated communication request of the first subscriber identity card to the second subscriber identity card according to determination results for the first communication status and the second communication status, wherein the first apparatus terminated communication request is initiated from a peer communication entity to request for establishing wireless communication with the first subscriber identity card.