Electronic device for selecting cell, and operation method therefor

A method for operating an electronic device, the method comprising:

• after establishing a radio resource control (RRC) connection with a first cell of a first radio access technology (RAT), identifying an occurrence of an event associated with release of the RRC connection with the first cell;
• in response to identifying the occurrence of the event, performing a camp on to a second cell of a second RAT different from the first RAT;
• starting a timer defined in a non-access stratum (NAS) based on a failure in registration to a core network corresponding to the second RAT;
• and
• performing, based on starting the timer, any one of a scan associated with the first RAT or a scan associated with a RAT according to a preset priority, based on whether a service performed in a state of being connected to the first cell is an international mobile subscriber (IMS) call service.

A computer program product comprising a storage medium storing instructions configured to be executed by at least one processor of an electronic device to perform a plurality of operations comprising:

• after establishing a radio resource control (RRC) connection with a first cell of a first radio access technology (RAT), identifying an occurrence of an event associated with release of the RRC connection with the first cell;
• in response to identifying the occurrence of the event, performing a camp on to a second cell of a second RAT different from the first RAT;
• starting a timer defined in a non-access stratum (NAS) based on a failure in registration to a core network corresponding to the second RAT;
• and
• performing, based on starting the timer, any one of a scan associated with the first RAT or a scan associated with a RAT according to a preset priority, based on whether a service performed in a state of being connected to the first cell is an international mobile subscriber (IMS) call service.