The present invention relates to a method for mobile communication carried out among a plurality of mobile stations and a network, wherein personal identifiers are previously assigned to mobile stations. The method comprises the steps of assigning temporary identifiers to mobile stations in communication with the network, storing the personal identifiers and the temporary identifiers of the mobile stations by the network, storing the personal identifiers and the temporary identifiers of each mobile station by the mobile station, detecting, by the network, that one of the temporary identifiers stored in itself is different from that stored in the corresponding mobile station, and reassigning, by the network, another temporary identifier to the mobile station of which the former temporary identifier stored in the network is detected to be different from that stored in the corresponding mobile station.