Patent ID: 8170614

Claim:
An operation method for a dual-subscriber identity module (SIM) mobile terminal, comprising: detecting, upon turning on the dual-SIM mobile terminal, whether a first SIM card and a second SIM card are installed in a first card socket and a second card socket; storing a SIM identification information regarding the first SIM card if the first SIM card is installed in the first card socket; storing SIM identification information regarding the second SIM card if the second SIM card is installed in the second card socket; selecting and performing a boot procedure according to the number of installed SIM cards by: performing the boot procedure based on the installed SIM card when a single SIM card is installed in a socket; and performing the boot procedure based on a preset SIM when both the first and second SIM cards are installed in the sockets, wherein performing a boot procedure comprises: inputting an identification signal to the first card socket or the second card socket; detecting one of the first SIM card and second SIM card outputting a response signal associated with the identification signal; and initializing the dual-SIM mobile terminal using the detected SIM card.