A user equipment (UE) may include a first subscriber identity module corresponding to a first cellular network, a second subscriber identity module corresponding to a second cellular network, a wireless communication circuit, and a processor. The processor may be is configured to: perform data communication with the first cellular network that supports EUTRA NR dual connectivity (EN-DC) using first identity information of the first subscriber identity module, via the wireless communication circuit; detect an activity that triggers data communication via the second cellular network; and in response to the detection of the activity, perform a process of connecting data communication with the second cellular network using second identify information of the second subscriber identity module via the wireless communication circuit, and maintain support of an EN-DC of a UE capability associated with the first cellular network.