An electronic device (101;401) comprising: at least one wireless communication circuit ; a processor (120;420) operatively connected with the at least one wireless communication circuit ; and a memory (130;430) operatively connected with the processor (120;420), wherein the memory (130;430) stores one or more instructions that, when executed, cause the processor (120;420) 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, characterized in that the memory causes the processor to : release the connection with the second cell when a type of the mobile originated call is an emergency call, wherein in order to release the connection with the second cell the one or more instructions cause the processor (120;420) to transmit information indicating a radio link failure for the SCG to the first cell with a SCG failure cause set to a value corresponding to an emergency call, and perform the mobile originated call through the first cell . at least one wireless communication circuit ; a processor (120;420) operatively connected with the at least one wireless communication circuit ; and a memory (130;430) operatively connected with the processor (120;420), wherein the memory (130;430) stores one or more instructions that, when executed, cause the processor (120;420) 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, characterized in that the memory causes the processor to : release the connection with the second cell when a type of the mobile originated call is an emergency call, wherein in order to release the connection with the second cell the one or more instructions cause the processor (120;420) to transmit information indicating a radio link failure for the SCG to the first cell with a SCG failure cause set to a value corresponding to an emergency call, and perform the mobile originated call through the first cell . 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, characterized in that the memory causes the processor to : release the connection with the second cell when a type of the mobile originated call is an emergency call, wherein in order to release the connection with the second cell the one or more instructions cause the processor (120;420) to transmit information indicating a radio link failure for the SCG to the first cell with a SCG failure cause set to a value corresponding to an emergency call, and perform the mobile originated call through the first cell . release the connection with the second cell when a type of the mobile originated call is an emergency call, wherein in order to release the connection with the second cell the one or more instructions cause the processor (120;420) to transmit information indicating a radio link failure for the SCG to the first cell with a SCG failure cause set to a value corresponding to an emergency call, and perform the mobile originated call through the first cell . <EOS>