A method and mobile terminal are disclosed for use in a wireless communication system in order for the mobile terminal to be able to transition from a dual mode, in which a packet switched connection and circuit switched connection are used together, to a single mode in which packets are transferred. The mobile terminal is for receiving minimum system information necessary to perform the transition in an uninterrupted manner, instead of an interrupted manner. This system information is broadcast to the mobile terminal on a regular basis, and is also sent to the mobile terminal partly or entirely by point-to-point transfer if a piece of the minimum system information is missing due to inadequate broadcast reception or some other reason. This system information is then employed by the mobile terminal to transition from the dual mode to the single mode in the uninterrupted manner.