An electronic device comprising: a first subscriber identification module ; a second subscriber identification module ; a communication circuitry operatively connected to the first subscriber identification module and the second subscriber identification module, wherein the first subscriber identification module is in a radio resource control, RRC, connection state, and the second subscriber identification module is in an RRC idle state, and the idle state is configured to include a state without data transmission/reception, based on the subscriber identification module; and a processor operatively connected to the communication circuitry, wherein processor is configured to: - monitor paging cycles for the first subscriber identification module and the second subscriber identification module, - determine whether a paging conflict has occurred in which a first paging cycle of the first subscriber identification module and a second paging cycle of the second subscriber identification module overlap for at least a certain interval, and - determine whether a serving cell is changed in at least one of the first subscriber identification module and the second subscriber identification module for a certain interval, when the processor determines that the paging conflict has occurred; - perform cell reselection for the second subscriber identification module in an idle state, based on no change in the serving cell of the first subscriber identification module and the serving cell of the second subscriber identification module for the certain interval. a first subscriber identification module ; a second subscriber identification module ; a communication circuitry operatively connected to the first subscriber identification module and the second subscriber identification module, wherein the first subscriber identification module is in a radio resource control, RRC, connection state, and the second subscriber identification module is in an RRC idle state, and the idle state is configured to include a state without data transmission/reception, based on the subscriber identification module; and a processor operatively connected to the communication circuitry, wherein processor is configured to: - monitor paging cycles for the first subscriber identification module and the second subscriber identification module, - determine whether a paging conflict has occurred in which a first paging cycle of the first subscriber identification module and a second paging cycle of the second subscriber identification module overlap for at least a certain interval, and - determine whether a serving cell is changed in at least one of the first subscriber identification module and the second subscriber identification module for a certain interval, when the processor determines that the paging conflict has occurred; - perform cell reselection for the second subscriber identification module in an idle state, based on no change in the serving cell of the first subscriber identification module and the serving cell of the second subscriber identification module for the certain interval. - monitor paging cycles for the first subscriber identification module and the second subscriber identification module, - determine whether a paging conflict has occurred in which a first paging cycle of the first subscriber identification module and a second paging cycle of the second subscriber identification module overlap for at least a certain interval, and - determine whether a serving cell is changed in at least one of the first subscriber identification module and the second subscriber identification module for a certain interval, when the processor determines that the paging conflict has occurred; - perform cell reselection for the second subscriber identification module in an idle state, based on no change in the serving cell of the first subscriber identification module and the serving cell of the second subscriber identification module for the certain interval. <EOS>