An electronic device according to one embodiment comprises: at least one processor; a first slot connected to the at least one processor and capable of receiving a first detachable SIM; a second slot selectively connectable to the at least one processor and capable of receiving a second detachable SIM; an eSIM selectively connectable to the at least one processor and included in the electronic device; and a switch configured to connect any one of the second slot or the eSIM to the at least one processor, wherein the at least one processor is configured to: obtain first information indicating whether to support the eSIM from a network; control the switch such that the at least one processor is connected to the second slot, on the basis of detection of a first event for using the second SIM based on confirmation that the first information supports the eSIM; control the switch such that the at least one processor is connected to the eSIM, on the basis of detection of a second event for using the eSIM; and control the switch such that the at least one processor is connected to the second slot, on the basis of confirmation that the first information does not support the eSIM.