A mobile station has multiple communication modules for multiple wireless communication modes. In a first wireless communication mode, the mobile station communicates with a wireless wide area network and is identified by a first, mobile directory number. In a second wireless communication mode, the mobile station communicates with a wireless local area network and is still identified by the first, mobile directory number. In a third wireless communication mode, the mobile station communicates with the wireless local area network but is identified by a second, local directory number.