An electronic device is provided. The electronic device includes at least one wireless communication circuit, a processor, and a memory. The memory may store one or more instructions that, when executed, cause the processor to connect with a first cell of a master cell group (MCG) and a second cell of a secondary cell group (SCG) using the at least one wireless communication circuit, detect occurrence of a packet based mobile originated call, release the connection with the second cell when a type of the mobile originated call is an emergency call, and perform the mobile originated call through the first cell.