According to an embodiment of the invention, the first cell of the first RAT is configured to provide access to a first core network and the second cell of the second RAT is configured to provide access to a second core network different from the first core network. In an embodiment of the invention, the first core network is an LTE core network or a 4G core network, and the second core network is a Next Generation-Radio Access Network (NG-RAN) or a 5G core network. It should be understood that when the communications apparatus 100 has the ability to directly access a cell which provides access to the NG-RAN or the 5G core network, the communications apparatus 100 operates in the standalone (SA) mode.

According to the first embodiment of the invention, the processor 222 is configured to perform the operations of receiving the second system information and deriving the information regarding one or more cells of the second RAT before attempting to access the first cell that has been found in the corresponding cell search procedure, for example, in steps S302 and S304. That is, in the first embodiment of the invention, Step S310 is performed after the first cell has been found and before an attempt to access the first cell is performed. In the first embodiment of the invention, the processor 222 may be configured to not attempt to access the first cell until determining that the second system information is not scheduled by the first cell.