Patent ID: 8855725

Claim:
An apparatus for reducing power consumption in a multi-mode portable terminal supporting a plurality of Radio Frequency (RF) modules and a plurality of Subscriber Identity Module (SIM) cards, the apparatus comprising: a SIM management unit which determines that the portable terminal comprises multiple SIM cards of a same serving cell and provides information thereof to a control unit; and the control unit which activates only one of the RF modules corresponding to the SIM cards of the same serving cell when the control unit receives the information of the SIM cards of the same serving cell from the SIM management unit, wherein a case where the SIM cards are of the same serving cell includes one of a case where service providers of the SIM cards are identical and use the same serving cell, a case where the service providers of the SIM cards are roamable and become identical by Public Land Mobile Network (PLMN) selection, and a case of a multiple PLMN-ID environment where one cell is shared by multiple service providers.