A disclosure of this specification provides a device configured to operate in a wireless system. The device may comprise: a transceiver configured with an Evolved Universal Terrestrial Radio Access (E-UTRA)-New Radio (NR) Dual Connectivity (EN-DC). The EN-DC may be configured to use three bands. The device may comprise: a processor operably connectable to the transceiver. The processer may be configured to: control the transceiver to receive a downlink signal and control the transceiver to transmit an uplink signal via at least two bands among the three bands. A value of Maximum Sensitivity Degradation (MSD) may be applied to a reference sensitivity for receiving the downlink signal.