A wireless communication unit (101) is operable to reformat dialed numbers according to dialing plans for a plurality of communication networks (103, 107, 109), where the unit comprises a transceiver (201) for communicating with any of the plurality of communication networks; a user interface (211) operable to provide a number corresponding to a target unit (102, 102') to be called; and a controller (209) implementing a corresponding method to provide a reformatted number (FIG. 3) corresponding to the number and according to a preference that is specific to the wireless communication unit, where the reformatted number is compatible with a dialing plan for a communication network that will be used to place a call to the target unit.