A communication device for handling system information in a wireless communication system, the communication device comprising: a storage unit for storing instructions; and a processing means , coupled to the storage unit , wherein the storage unit is configured to store, and the processing means is configured to execute the following instructions in order: receiving a system information block SIB1 comprising at least a freqBandIndicator and a first multiBandInfoList, from a first cell in a radio resource control, RRC, connected mode; receiving a system information block SIB2 comprising at least the freqBandIndicator and the first multiBandInfoList, from the first cell in the RRC connected mode; applying at least the freqBandIndicator and the first multiBandInfoList received from the first cell in the system information block SIB1 in the RRC connected mode; characterised by applying a first AdditionalSpectrumEmission in the system information block SIB1 according to the freqBandIndicator, when applying the freqBandIndicator in the RRC connected mode; or applying a second AdditionalSpectrumEmission in the system information block SIB2, when applying a frequency band in the first multiBandInfoList in the system information block SIB1 in the RRC connected mode. a storage unit for storing instructions; and a processing means , coupled to the storage unit , wherein the storage unit is configured to store, and the processing means is configured to execute the following instructions in order: receiving a system information block SIB1 comprising at least a freqBandIndicator and a first multiBandInfoList, from a first cell in a radio resource control, RRC, connected mode; receiving a system information block SIB2 comprising at least the freqBandIndicator and the first multiBandInfoList, from the first cell in the RRC connected mode; applying at least the freqBandIndicator and the first multiBandInfoList received from the first cell in the system information block SIB1 in the RRC connected mode; characterised by applying a first AdditionalSpectrumEmission in the system information block SIB1 according to the freqBandIndicator, when applying the freqBandIndicator in the RRC connected mode; or applying a second AdditionalSpectrumEmission in the system information block SIB2, when applying a frequency band in the first multiBandInfoList in the system information block SIB1 in the RRC connected mode. receiving a system information block SIB1 comprising at least a freqBandIndicator and a first multiBandInfoList, from a first cell in a radio resource control, RRC, connected mode; receiving a system information block SIB2 comprising at least the freqBandIndicator and the first multiBandInfoList, from the first cell in the RRC connected mode; applying at least the freqBandIndicator and the first multiBandInfoList received from the first cell in the system information block SIB1 in the RRC connected mode; characterised by applying a first AdditionalSpectrumEmission in the system information block SIB1 according to the freqBandIndicator, when applying the freqBandIndicator in the RRC connected mode; or applying a second AdditionalSpectrumEmission in the system information block SIB2, when applying a frequency band in the first multiBandInfoList in the system information block SIB1 in the RRC connected mode. <EOS>