Multi-sim device and operation method thereof

A method of operating a multi-subscriber identification module (multi-SIM) device comprising a first SIM and a second SIM, the method comprising:

• generating, by using the first SIM, a radio frequency (RF) resource request;
• setting a dual radio (DR) mode in which use of a non-limited channel configuration and use of a limited channel configuration are simultaneously supported, based on first information regarding a first network corresponding to the first SIM and second information regarding a second network corresponding to the second SIM;
• and
• assigning any one of a first RF resource supporting the use of the non-limited channel configuration and a second RF resource supporting the use of the limited channel configuration to the first SIM and the other one of the first RF resource and the second RF resource to the second SIM.

A multi-subscriber identification module (multi-SIM) device comprising:

• a first radio frequency (RF) resource configured to support use of a non-limited channel configuration according to a radio resource control (RRC) protocol;
• a second RF resource configured to support use of a limited channel configuration according to the RRC protocol;
• and
• a baseband processor configured to communicate with a first network and a second network based on information stored in a first SIM and a second SIM using the first RF resource and the second RF resource,
• wherein the baseband processor configured to operate the multi-SIM device in a dual SIM dual standby (DSDS) mode, except in response to a first RF resource use interval of the first SIM overlapping with a second RF resource use interval of the second SIM.