In order to prevent a user equipment, called UE hereinafter, from wasting unnecessary radio resources and occurrence of software failure of the UE, a method of performing an operating frequency transferring request for the UE in a wireless communications system includes reporting a request message to request for transferring to a preferred frequency corresponding to UE interested MBMS services when the UE operates in the CELL_DCH state and has successfully selected the preferred frequency as a current operating frequency.