Electronic device having multiple subscriber identity modules and method therefor

1. A method comprising:

while a power supply of an electronic device is turned on, detecting, by a processor, that a communication module is enabled by a reader which is contacted with or located in proximity to an electronic device;

determining, by the processor, a Service Identification Module (SIM) associated with an application being executed on the electronic device from a plurality of SIMs that are available in the electronic device;

switching, by the processor, a switch to connect the communication module with the determined SIM;

communicating, by the communication module, with the reader based on information stored in the determined SIM; and

while the power supply is turned off, the switch is switched to connect the communication module to a SIM designated for use while the power supply is turned off.

2. The method of claim 1 , wherein the SIM is determined based on a configuration setting pre-stored in the electronic device.

3. The method of claim 1 , wherein the SIM is determined based on whether a predetermined application is being executed when the reader is sensed.

4. The method of claim 1 , further comprising:

detecting that an application installed in the electronic device is being executed; and

detecting a command for displaying a SIM selection menu,

wherein the SIM is determined based on an input to the menu.

5. The method of claim 1 , further comprising detecting a command for displaying a SIM selection menu, wherein the SIM is determined based on an input to the menu.

6. The method of claim 5 , further comprising outputting a message displaying information related to the determined SIM.

7. The method of claim 1 , further comprising displaying a SIM selection menu in response to the communication module being enabled, wherein the SIM is determined by using the menu.

8. The method of claim 1 , further comprising displaying a SIM selection menu identifying each of the plurality of SIMs, wherein the SIM is determined by using the menu.

9. The method of claim 1 , further comprising outputting a message guiding the SIM designated for use while the power supply is turned off in response to detecting a command for turning off a power supply of the electronic device.

10. The method of claim 1 , further comprising:

communicating, by the communication module, with the reader based on information stored in the designated SIM while the power supply is turned off.

11. An electronic device comprising:

a plurality of Service Identification Modules (SIMs);

a communication module;

a switch configured to connect the communication module with one of the plurality of SIMs; and

a processor configured to:

while a power supply of an electronic device is turned on, detect that the communication module is enabled by a reader which is contacted with or located in proximity to the electronic device,

determine a SIM associated with an application being executed on the electronic device from the plurality of SIMs, and

control the switch to connect the communication module with the determined SIM,

wherein the communication module communicates with the reader based on information stored in the determined SIM or the designated SIM, and

wherein the switch is, while the power supply is turned off, switched to connect the communication module to a SIM designated for use while the power supply is turned off.

12. The electronic device of claim 11 , wherein the SIM is determined based on a configuration setting pre-stored in the electronic device.

13. The electronic device of claim 11 , wherein the SIM is determined based on whether a predetermined application is being executed when the reader is sensed.

14. The electronic device of claim 11 , wherein the display is further configured to display a SIM selection menu, and the processor is further configured to:

detect that an application installed in the electronic device is being executed,

detect a command for displaying the SIM selection menu, and

wherein the SIM is determined based on an input to the menu.

15. The electronic device of claim 11 , wherein the display is further configured to display a SIM selection menu, and the processor is further configured to detect a command for displaying the SIM selection menu, wherein the SIM is determined based on an input to the menu.

16. The electronic device of claim 15 , wherein the processor is configured to output a message displaying information related to the determined SIM.

17. The electronic device of claim 11 , wherein the processor being further configured to display a SIM selection menu in response to the communication module being enabled, wherein the SIM is determined by using the menu.

18. The electronic device of claim 11 , wherein the processor is further configured to display a SIM selection menu identifying each of the plurality of SIMs, wherein the SIM is determined by using the menu.

19. The electronic device of claim 11 , wherein the processor is to output a message guiding the SIM designated for use while the power supply is turned off in response to detecting a command for turning off the power supply of the electronic device.

20. The electronic device of claim 11 , wherein the communication module is further configured to communicate, while the power supply is turned off, with the reader based on information stored in the designated SIM.

21. An electronic device comprising:

a plurality of Service Identification Modules (SIMs);

a communication module;

a switch configured to connect the communication module with one of the plurality of SIMs; and

a processor configured to:

detect that the communication module is enabled by a reader which is contacted with or located in proximity to the electronic device,

determine a SIM associated with an application being executed on the electronic device from the plurality of SIMs,

control the switch to connect the communication module with the determined SIM during a power-on of the electronic device, and

control the switch to connect the communication module with a pre-designated SIM for use during a power-off of the electronic device,

wherein the communication module communicates with the reader based on information stored in the determined SIM or the pre-designated SIM.