A dual-SIM mobile terminal and operation method for the same are disclosed. The dual-SIM mobile terminal checks the number of installed SIM cards during booting, and activates and deactivates the SIM switching mode according to the identified SIM card information. The operation method includes: detecting whether a first SIM card and second SIM card are installed in a first card socket and second card socket; storing SIM identification information regarding the detected SIM card; and performing a boot procedure on the basis of the detected SIM card. In particular, the SIM switching menu is displayed in an activated or deactivated state according to the identified SIM card information. Hence, the user can readily identify the number of installed SIM cards and the availability of SIM card switching through display status of the SIM switching menu.