A first electronic device (410,510) supporting multiple Internet Protocol, IP, multimedia subsystem, IMS, networks, comprising: a plurality of Subscriber Identity Module, SIM, cards including a first SIM card corresponding to a first entity and a second SIM card corresponding to a second entity; a modem configured to receive communication services through an access network (120,430,530) and multiple IMS networks that includes at least a first IMS network (130,450,550) and a second IMS network (460,560); and a communication control module including a processor, wherein the communication control module is configured to: connect the first electronic device to the access network on a basis of a first identification information corresponding to the access network by use of the modem; register the first electronic device in the first IMS network via the access network on the basis of a second identification information corresponding to the first IMS network, and register the first electronic device in the second IMS network via the access network on the basis of a third identification information corresponding to the second IMS network; establish an additional call connection with at least one external device through the first IMS network and in response the first IMS network sending a bearer creation request to the access network; in response to the bearer creation request, creating a bearer by the access network between the electronic device and the access network; and after the bearer is created between the electronic device and the access network, providing a call service through the access network and the second IMS network, based on the third identification information; wherein the processor is configured to obtain the first identification information from the first SIM card and obtain the second identification information from the second SIM card. a plurality of Subscriber Identity Module, SIM, cards including a first SIM card corresponding to a first entity and a second SIM card corresponding to a second entity; a modem configured to receive communication services through an access network (120,430,530) and multiple IMS networks that includes at least a first IMS network (130,450,550) and a second IMS network (460,560); and a communication control module including a processor, wherein the communication control module is configured to: connect the first electronic device to the access network on a basis of a first identification information corresponding to the access network by use of the modem; register the first electronic device in the first IMS network via the access network on the basis of a second identification information corresponding to the first IMS network, and register the first electronic device in the second IMS network via the access network on the basis of a third identification information corresponding to the second IMS network; establish an additional call connection with at least one external device through the first IMS network and in response the first IMS network sending a bearer creation request to the access network; in response to the bearer creation request, creating a bearer by the access network between the electronic device and the access network; and after the bearer is created between the electronic device and the access network, providing a call service through the access network and the second IMS network, based on the third identification information; wherein the processor is configured to obtain the first identification information from the first SIM card and obtain the second identification information from the second SIM card. connect the first electronic device to the access network on a basis of a first identification information corresponding to the access network by use of the modem; register the first electronic device in the first IMS network via the access network on the basis of a second identification information corresponding to the first IMS network, and register the first electronic device in the second IMS network via the access network on the basis of a third identification information corresponding to the second IMS network; establish an additional call connection with at least one external device through the first IMS network and in response the first IMS network sending a bearer creation request to the access network; in response to the bearer creation request, creating a bearer by the access network between the electronic device and the access network; and after the bearer is created between the electronic device and the access network, providing a call service through the access network and the second IMS network, based on the third identification information; wherein the processor is configured to obtain the first identification information from the first SIM card and obtain the second identification information from the second SIM card.