Abstract:
A wireless communications device is provided with a plurality of card slots, a first wireless communications module, and a second wireless communications module. The card slots are inserted with at least one subscriber identity card. The first wireless communications module performs wireless transceiving in compliance with at least a first wireless technology. The second wireless communications module determines at least a first subscriber number and a second subscriber number from the at least one subscriber identity card, and enables the wireless transceiving of the first wireless communications module using the first subscriber number. Also, the second wireless communications module performs wireless transceiving in compliance with at least a second wireless technology using the second subscriber number.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation of U.S. patent application Ser. No. 13/075,045, filed on Mar. 29, 2011, which claims priority of China Patent Application No. 201010144086.7, filed on Mar. 29, 2010, the entirety of which is incorporated by reference herein. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    The invention generally relates to the coordination of operations of multiple wireless communications modules, and more particularly, to the coordination of multiple co-located wireless communications modules to support multiple-standby operations using one or more subscriber identity cards. 
         [0004]    2. Description of the Related Art 
         [0005]    With growing demand for ubiquitous computing and networking, various wireless communication technologies have been developed, such as the Global System for Mobile communications (GSM) technology, General Packet Radio Service (GPRS) technology, Enhanced Data rates for Global Evolution (EDGE) technology, Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (UTRA) technology, High Speed xlink Packet Access (HSxPA) technology, Long Term Evolution (LTE) technology, LTE-Advanced technology, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) technology, Time-Division LTE (TD-LTE) technology, TD-LTE-Advanced technology, Interim Standard 95 (IS-95) technology, Code Division Multiple Access 2000 (CDMA2000) technology, CDMA 2000 1× Evolution-Data Optimized or Evolution-Data (CDMA2000 1× EV-DO) technology, Worldwide Interoperability for Microwave Access (WiMAX) technology, and others. Generally, a cellular phone only supports one wireless communication technology and provides a user with the flexibility of mobile communications at all times via the supported wireless communication technology, regardless of his/her geographic location. Especially in today&#39;s business world, a cellular phone is becoming a necessary business tool for conveniently conducting business. For business people, having an additional cellular phone exclusively for business matters is a common choice, since they need to conduct business while out of the office or even out of the city/country. Others may find that having an additional cellular phone is a good way to save/control the budget for wireless service charges (including phone services and/or data services). However, having two or more than two cellular phones may be troublesome when one has to switch frequently between the cellular phones and carry around all the cellular phones with himself/herself. In order to provide a convenient way of having multiple subscriber numbers, dual-mode cellular phones have been developed, which generally have two wireless communications modules for respectively performing wireless transmission and reception with an individual subscriber number. The dual-mode design allows both wireless communications modules to be active simultaneously and allows calls to be received on either subscriber numbers associated with one of the wireless communications modules at any time. Thus, a dual-mode cellular phone may be used for business and personal use with separate subscriber numbers and bills, or for travel with the second subscriber number for the country visited. 
         [0006]    Generally, a dual-mode cellular phone has 1 to 2 card slots in which subscriber identity cards are inserted. Taking a dual-mode cellular phone supporting the CDMA and GSM technologies and having 2 card slots as an example, one card slot is reserved for inserting a Removable User Identity Module (R-UIM) card which stores information concerning subscriber identity, subscriber number, and phone book, etc., for the CDMA technology, and the other card slot is reserved for inserting a Subscriber Identity Module (SIM) card which stores information concerning subscriber identity, subscriber number, and phone book, etc., for the GSM technology. The dual-mode dual-slot cellular phone may provide that both the CDMA and GSM technologies to operate in the standby mode. Since the design of the card slots is accorded with the supported wireless technologies (i.e. one card slot for the CDMA technology, and the other card slot for the GSM technology), inconveniences may arise when the user wishes to use the wireless services of the CDMA technology or the GSM technology using 2 R-UIM cards or 2 SIM cards, and when the user mistakenly inserts a SIM card in the card slot for the CDMA technology or a R-UIM card in the card slot for the GSM technology. Especially in the latter situation, inserting the wrong type of subscriber identity cards may cause the dual-mode cellular phone to not be able to launch wireless functions normally and further hinder user experience. 
         [0007]    On the other hand, for a dual-mode single-slot cellular phone, it may be provided with only one of the CDMA and GSM technologies operating in the standby mode, or it may be provided with both the CDMA and GSM technologies operating in the standby mode but under a condition that the card slot is usually reserved for only inserting a SIM card. In the former situation, having only one of the CDMA and GSM technologies operating in the standby mode is inconvenient as the user is required to manually switch the active wireless services between the CDMA and GSM technologies. In the latter situation, reserving only one type of subscriber identity card for insertion limits the cellular phone to store only the phone book, short messages, and other information for the GSM technology in the local storage module. 
         [0008]    Therefore, it is desirable to have a flexible way of coordinating the operations of multiple wireless communications modules in a wireless communications device having multiple card slots, so that multiple standby operations of the multiple wireless communications modules may be provided. 
       BRIEF SUMMARY OF THE INVENTION 
       [0009]    Accordingly, embodiments of the invention provide apparatuses and methods for coordinating the operations of multiple wireless communications modules with multiple subscriber numbers. In one aspect of the invention, a wireless communications device with a plurality of card slots, a first wireless communications module, and a second wireless communications module is provided. The card slots are inserted with at least one subscriber identity card. The first wireless communications module performs wireless transceiving in compliance with at least a first wireless technology. The second wireless communications module determines at least a first subscriber number and a second subscriber number from the at least one subscriber identity card, and enables the wireless transceiving of the first wireless communications module using the first subscriber number. Also, the second wireless communications module performs wireless transceiving in compliance with at least a second wireless technology using the second subscriber number. 
         [0010]    In another aspect of the invention, a wireless communications device with a plurality of card slots, a first wireless communications module, a second wireless communications module, and an application processor is provided. The card slots are inserted with at least one subscriber identity card. The first wireless communications module and the second wireless communications module perform wireless transceiving in compliance with at least a first wireless technology and at least a second wireless technology, respectively. The application processor determines at least a first subscriber number and a second subscriber number from the at least one subscriber identity card, and enables the wireless transceiving of the first wireless communications module and the second wireless communications module using the first subscriber number and the second subscriber number, respectively. 
         [0011]    In another aspect of the invention, a method for coordinating operations of multiple wireless communications modules in a wireless communications device with multiple subscriber numbers is provided. The method comprises the steps of providing a first wireless communications module and a second wireless communications module in compliance with at least a first wireless technology and at least a second wireless technology, respectively, detecting at least one subscriber identity card inserted into a plurality of card slots, determining at least a first subscriber number and a second subscriber number from the at least one subscriber identity card, and enabling the first wireless communications module and the second wireless communications module for wireless transceiving using the first subscriber number and the second subscriber number, respectively. 
         [0012]    Other aspects and features of the present invention will become apparent to those with ordinarily skill in the art upon review of the following descriptions of specific embodiments of the apparatuses and methods for coordinating the operations of multiple wireless communications modules with multiple subscriber numbers. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0013]    The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein: 
           [0014]      FIG. 1  is a block diagram of a wireless communications environment according to an embodiment of the invention; 
           [0015]      FIG. 2  is a block diagram illustrating the architecture of an MS with two card slots according to an embodiment of the invention; 
           [0016]      FIG. 3A  is a block diagram illustrating the architecture of an MS with two card slots according to another embodiments of the invention; 
           [0017]      FIGS. 3B and 3C  are block diagrams illustrating alternatives for the architecture of the MS in  FIG. 3A ; 
           [0018]      FIG. 4  is a block diagram illustrating the architecture of an MS with two card slots according to yet another embodiment of the invention; 
           [0019]      FIG. 5A  is a block diagram illustrating the architecture of an MS with two card slots according to still another embodiment of the invention; 
           [0020]      FIGS. 5B and 5C  are block diagrams illustrating alternatives for the architecture of the MS in  FIG. 5A ; 
           [0021]      FIG. 6A  is a block diagram illustrating the architecture of an MS with three card slots according to an embodiment of the invention; 
           [0022]      FIG. 6B  is a block diagram illustrating an alternative for the architecture of the MS in  FIG. 6A ; 
           [0023]      FIG. 7A  is a block diagram illustrating the architecture of an MS with three card slots according to another embodiment of the invention; 
           [0024]      FIG. 7B  is a block diagram illustrating an alternative for the architecture of the MS in  FIG. 7A ; 
           [0025]      FIG. 8  is a block diagram illustrating the architecture of an MS with three card slots according to yet another embodiment of the invention; 
           [0026]      FIG. 9  is a block diagram illustrating the architecture of an MS with an application processor according to an embodiment of the invention; 
           [0027]      FIG. 10  is a flow chart illustrating an embodiment of the method for coordinating the operations between two communication modules with respect to the architectures shown in  FIGS. 2 and 4 ; 
           [0028]      FIG. 11  is a flow chart illustrating an embodiment of the method for coordinating the operations between two communication modules with respect to the architectures shown in  FIGS. 3A and 5A ; 
           [0029]      FIG. 12  is a flow chart illustrating an embodiment of the method for coordinating the operations between two communication modules with respect to the architectures shown in  FIGS. 3B and 5B ; and 
           [0030]      FIG. 13  is a flow chart illustrating an embodiment of the method for coordinating the operations between two communication modules with respect to the architectures shown in  FIGS. 6A, 6B, 7A, and 7B . 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0031]    The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. It should be understood that the embodiments may be realized in software, hardware, firmware, or any combination thereof. 
         [0032]      FIG. 1  is a block diagram of a wireless communications environment according to an embodiment of the invention. The wireless communications environment  100  comprises a mobile station (MS)  110 , and service networks  120  and  130 . The MS  110  may wirelessly communicate with the service networks  120  and  130  with two separate subscriber numbers, after camping on two cells. The cell may be managed by a node-B, a base station (BS), an advanced BS (ABS), an enhanced BS (EBS), or others. The service networks  120  and  130  may be in compliance with any two of the GSM, GPRS, EDGE, UTRA, HSxPA, LTE, LTE-Advanced, TD-SCDMA, TD-LTE, TD-LTE-Advanced, IS-95, CDMA2000 1×, CDMA2000 1× EV-DO, and WiMAX, technologies. The subscriber numbers may be provided by two separate subscriber identity cards in compliance with the specifications of the technologies employed by the service networks  120  and  130 . For example, the service network  120  may be a GSM, GPRS, or EDGE system and correspondingly, one of the subscriber identity cards may be a Subscriber Identity Module (SIM) card, while the service network  130  may be a CDMA2000 1× or CDMA2000 1× EV-DO system and correspondingly, the other one of the subscriber identity cards may be an R-UIM card. Alternatively, the service network  130  may be a UTRA, LTE, LTE-Advanced, TD-LTE, or TD-LTE-Advanced system and correspondingly, the other one of the subscriber identity cards may be a Universal SIM (USIM) card. Moreover, the service network  130  may be a TD-SCDMA system and correspondingly, the other one of the subscriber identity cards may be a CDMA subscriber Identity Module (CSIM) card. 
         [0033]    The MS  110  wirelessly accesses Internet resources, such as an e-mail transmission, Web browsing, file uploading/downloading, instant messaging, streaming videos, voice over IPs (VOIP) or others, or makes a wireless phone call. In addition, a computer host or a notebook may connect/couple to the MS  110  and wirelessly access Internet resources therethrough.  FIG. 2  is a block diagram illustrating the architecture of an MS with two card slots according to an embodiment of the invention. The MS  200  comprises a CDMA module  210 , a GSM module  220 , and two card slots  231  and  232  coupled to the CDMA module  210 . The CDMA module  210  may provide the functionality of wireless transceiving in compliance with any combination of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies, while the GSM module  220  may provide the functionality of wireless transceiving in compliance with any combination of the GSM, GPRS, and EDGE technologies. Particularly, the CDMA module  210  and the GSM module  220  are coupled with the RF modules  211  and  221 , respectively, wherein the RF modules  211  and  221  are further coupled with the antenna  212  and  222 , respectively. In other embodiments, the CDMA module  210  may be further coupled to one or more extra sets of an RF module and an antenna (not shown) for increasing the data rate of the wireless transceiving from and to the CDMA module  210 , and the invention is not limited thereto. Each of the CDMA module  210  and the GSM module  220  may contain multiple hardware devices to perform baseband signal processing, including analog to digital conversion (ADC)/digital to analog conversion (DAC), gain adjusting, modulation/demodulation, encoding/decoding, and so on. The RF modules  211  and  221  may receive RF wireless signals from the antennae  212  and  222 , respectively, and convert the received RF wireless signals to baseband signals, which are then processed by the CDMA module  210  and the GSM module  220 . Also, the RF modules  211  and  221  may receive baseband signals from the CDMA module  210  and the GSM module  220 , respectively, and convert the received baseband signals to RF wireless signals, which are later transmitted via the antennae  212  and  222 . Each of the RF modules  212  and  222  may also contain multiple hardware devices to perform radio frequency conversion. For example, each of the RF modules  212  and  222  may comprise a mixer to multiply the baseband signals with a carrier oscillated in the radio frequency of the wireless communications system, wherein the radio frequency may be 900 MHz, 1800 MHz or 1900 MHz utilized in GSM systems, or may be 900 MHz, 1900 MHz or 2100 MHz utilized in UTRA systems, or others depending on the radio access technology (RAT) in use. In this embodiment, since there are two card slots  231  and  232  in the MS  200 , one or two subscriber identity cards may be inserted in the card slots  231  and  232  for providing subscriber information, such as the information concerning subscriber numbers, phone book contacts, and Short Message Service (SMS) messages, etc., for the CDMA module  210  and the GSM module  220 . 
         [0034]    Note that both the card slots  231  and  232  are coupled to the CDMA module  210 , so that the CDMA module  210  and the GSM module  220  are configured as a master and a slave, respectively. That is, the CDMA module  210  is responsible for detecting the number and type of subscriber identity cards inserted in the card slots  231  and  232 , and for activating the GSM module  220  to enter the standby mode in which the functionality of wireless transceiving is enabled, if one of the detected subscriber identity cards contains a subscriber number for the GSM module  220 . As a slave, the GSM module  220  may be initially configured to be off, and later switched to be on to enter the standby mode when activated by the CDMA module  210 . As a master, the CDMA module  210  determines the working mode of the MS  200  according to the number and type of the detected subscriber identity cards. For example, if only one single-mode subscriber identity card is detected to be a SIM card or an R-UIM card, the working mode of the MS  200  is determined to be a single communication mode in which the functionality of wireless transceiving of the CDMA module  210  is enabled with the R-UIM card or the functionality of wireless transceiving of the GSM module  220  is enabled with the SIM card. If two single-mode subscriber identity cards are detected to be a SIM card and an R-UIM card, or if only one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  200  is determined to be a double communication mode in which the functionalities of wireless transceiving of the CDMA module  210  and the GSM module  220  are enabled with the R-UIM card and the SIM card, respectively or enabled with two separate subscriber numbers read from the dual-mode subscriber identity card. If two single-mode subscriber identity cards are detected to be two SIM cards or two R-UIM cards, the working mode of the MS  200  is determined to be a double communication mode in which the functionality of wireless transceiving of the CDMA module  210  is enabled with the two R-UIM cards separately or the functionality of wireless transceiving of the GSM module  220  is enabled with the two SIM cards separately. If one single-mode subscriber identity card is detected to be a SIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  200  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  210  is enabled with one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM module  220  is enabled with the SIM card and the other subscriber number read from the dual-mode subscriber identity card. If one single-mode subscriber identity card is detected to be an R-UIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  200  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  210  is enabled with the R-UIM card and one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM module  220  is enabled with the other subscriber number read from the dual-mode subscriber identity card. If two dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected, the working mode of the MS  200  is determined to be a quadruple communication mode in which the functionality of wireless transceiving of the CDMA module  210  is enabled with two subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM module  220  is enabled with the other two subscriber numbers read from the dual-mode subscriber identity cards, respectively. To further clarify, in order to enable the functionality of wireless transceiving of the CDMA module  210  or the GSM module  220 , the CDMA module  210  reads the subscriber information stored in the detected subscriber identity card(s), and further transfers the subscriber information concerning the GSM module  220  to the GSM module  220  if one of the detected subscriber identity cards contains a subscriber number for the GSM module  220 . In addition, the CDMA module  210  may receive subscriber information concerning the GSM module  220  from the GSM module  220  and store the received subscriber information to the SIM card(s) or the dual-mode subscriber identity card(s). In another embodiment, the working mode of the MS  200  may be determined according to the previously stored working mode, or the user may manually input his/her selection for the working mode of the MS  200 . Alternatively, the working mode of the MS  200  may be determined according to any combination of the number and type of the detected subscriber identity cards, the previously stored working mode, and the user selection. 
         [0035]      FIG. 3A  is a block diagram illustrating the architecture of an MS with two card slots according to another embodiment of the invention. The MS  300  comprises a CDMA module  310  coupled with two card slots  331  and  332 , and a GSM/UTRA module  320 . The CDMA module  310  may provide the functionality of wireless transceiving in compliance with any combination of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies, while the GSM/UTRA module  320  may provide the functionality of wireless transceiving in compliance with any combination of the GSM, GPRS, EDGE, and UTRA technologies. The UTRA technology may refer to the UTRA-FDD (including release 99, release 4, release 5, or release 6), or UTRA-TDD High Chip Rate (HCR) or Low Chip Rate (LCR) (including release 99, release 4, release 5, or release 6). Particularly, the CDMA module  310  and the GSM/UTRA module  320  are coupled with the RF modules  311  and  321 , respectively, wherein the RF modules  311  and  321  are further coupled with the antenna  312  and  322 , respectively. In other embodiments, the CDMA module  310  may be further coupled to one or more extra sets of an RF module and an antenna (not shown) for increasing the data rate of the wireless transceiving from and to the CDMA module  310 , and likewise, the GSM/UTRA module  320  may be further coupled to one or more extra sets of an RF module and an antenna (not shown) for increasing the data rate of the wireless transceiving of the UTRA signals from and to the GSM/UTRA module  320 , and the invention is not limited thereto. Note that, in this embodiment, the CDMA module  310  and the GSM/UTRA module  320  are configured as a master and a slave, respectively. That is, the CDMA module  310  is responsible for detecting the number and type of subscriber identity cards inserted in the card slots  331  and  332 , and for activating the GSM/UTRA module  320  to enter the standby mode in which the functionality of wireless transceiving is enabled, if one of the detected subscriber identity cards contains a subscriber number for the GSM/UTRA module  320 . As a slave, the GSM/UTRA module  320  may be initially configured to be off, and later switched to be on to enter the standby mode when activated by the CDMA module  310 . As a master, the CDMA module  310  determines the working mode of the MS  300  according to the number and type of the detected subscriber identity cards. For example, if only one single-mode subscriber identity card is detected to be a SIM/USIM card, or an R-UIM card, the working mode of the MS  300  is determined to be a single communication mode in which the functionality of wireless transceiving of the CDMA module  310  is enabled with the R-UIM card or the GSM/UTRA module  320  is enabled with the SIM/USIM card. Specifically, for the case where the single-mode subscriber identity card is a SIM card, only the functionality of wireless transceiving in compliance with the GSM/GPRS/EDGE technology is enabled in the GSM/UTRA module  320 ; and for the case where the single-mode subscriber identity card is a USIM card, only the functionality of wireless transceiving in compliance with the UTRA technology is enabled in the GSM/UTRA module  320 . 
         [0036]    Furthermore, if two single-mode subscriber identity cards are detected to be a SIM/USIM card and an R-UIM card, or if only one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE/UTRA and the IS-95/CDMA2000 1×/CDMA2000 1×EV-DO technologies is detected, the working mode of the MS  300  is determined to be a double communication mode in which the functionalities of wireless transceiving of the CDMA module  310  and the GSM/UTRA module  320  are enabled with the R-UIM card and the SIM/USIM card, respectively, or enabled with two separate subscriber numbers read from the dual-mode subscriber identity card. If two single-mode subscriber identity cards are detected to be two SIM/USIM cards or two R-UIM cards, the working mode of the MS  300  is determined to be a double communication mode in which the functionality of wireless transceiving of the CDMA module  310  is enabled with the R-UIM cards separately or the functionality of wireless transceiving of the GSM/UTRA module  320  is enabled with the SIM/USIM cards separately. If one single-mode subscriber identity card is detected to be a SIM/USIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE/UTRA and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  300  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  310  is enabled with one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM/UTRA module  320  is enabled with the SIM/USIM card and the other subscriber number read from the dual-mode subscriber identity card. If one single-mode subscriber identity card is detected to be an R-UIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE/UTRA and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  300  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  310  is enabled with the R-UIM card and one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM/UTRA module  320  is enabled with the other subscriber number read from the dual-mode subscriber identity card. If two dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE/UTRA and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected, the working mode of the MS  300  is determined to be a quadruple communication mode in which the functionality of wireless transceiving of the CDMA module  310  is enabled with two subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM/UTRA module  320  is enabled with the other two subscriber numbers read from the dual-mode subscriber identity cards, respectively. To further clarify, in order to enable the functionality of wireless transceiving of the CDMA module  310  or the GSM/UTRA module  320 , the CDMA module  310  reads the subscriber information stored in the detected subscriber identity card(s), and further transfers the subscriber information concerning the GSM/UTRA module  320  to the GSM/UTRA module  320  if one of the detected subscriber identity cards contains a subscriber number for the GSM/UTRA module  320 . In addition, the CDMA module  310  may receive subscriber information concerning the GSM/UTRA module  320  from the GSM/UTRA module  320  and stores the received subscriber information to the SIM/USIM card(s) or the dual-mode subscriber identity card(s). In another embodiment, the working mode of the MS  300  may be determined according to the previously stored working mode, or the user may manually input his/her selection for the working mode of the MS  300 . Alternatively, the working mode of the MS  300  may be determined according to any combination of the number and type of the detected subscriber identity cards, the previously stored working mode, and the user selection. Note that, in one embodiment, the GSM/UTRA module  320  may be replaced with a combo communication module (denoted as a GSM/UTRA/LTE module  340 ) integrating the LTE module into the GSM/UTRA module  320 , as shown in  FIG. 3B , wherein only the functionality of wireless transceiving in compliance with the LTE technology is enabled in the GSM/UTRA/LTE module  340  if one of the detected subscriber identity contains a subscriber number for the LTE technology. The LTE technology may also refer to the LTE-Advanced, TD-LTE, or TD-LTE-Advanced technology. Alternatively, in another embodiment, the CDMA module  310  may be replaced with a combo communication module (denoted as a CDMA/LTE module  350 ) integrating the LTE module into the CDMA module  310 , as shown in  FIG. 3C , wherein only the functionality of wireless transceiving in compliance with the LTE technology is enabled in the CDMA/LTE module  350  if one of the detected subscriber identity contains a subscriber number for the LTE technology. For those skilled in the art, modifications to the operations and configurations of the GSM/UTRA/LTE module  340  and the CDMA/LTE module  350  may be contemplated according to the embodiment described above with respect to  FIG. 3A . 
         [0037]      FIG. 4  is a block diagram illustrating the architecture of an MS with two card slots according to yet another embodiment of the invention. Similar to  FIG. 2 , the MS  400  also comprises a CDMA module  410 , a GSM module  420 , and two card slots  431  and  432 . However, the card slots  431  and  432  are coupled to the GSM module  420 . The CDMA module  410  may provide the functionality of wireless transceiving in compliance with any combination of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies, while the GSM module  420  may provide the functionality of wireless transceiving in compliance with any combination of the GSM, GPRS, and EDGE technologies. Particularly, the CDMA module  410  and the GSM module  420  are coupled with the RF modules  411  and  421 , respectively, wherein the RF modules  411  and  421  are further coupled with the antenna  412  and  422 , respectively. In other embodiments, the CDMA module  410  may be further coupled to one or more extra sets of an RF module and an antenna (not shown) for increasing the data rate of the wireless transceiving from and to the CDMA module  410 , and the invention is not limited thereto. Note that, in this embodiment, the CDMA module  410  and the GSM module  420  are configured as a slave and a master, respectively. That is, the GSM module  420  is responsible for detecting the number and type of subscriber identity cards inserted in the card slots  431  and  432 , and for activating the CDMA module  410  to enter the standby mode in which the functionality of wireless transceiving is enabled, if one of the detected subscriber identity cards contains a subscriber number for the CDMA module  410 . As a slave, the CDMA module  410  may be initially configured to be off, and later switched to be on to enter the standby mode when activated by the GSM module  420 . As a master, the GSM module  420  determines the working mode of the MS  400  according to the number and type of the detected subscriber identity cards. For example, if only one single-mode subscriber identity card is detected to be a SIM card or an R-UIM card, the working mode of the MS  400  is determined to be a single mode in which the functionality of wireless transceiving of the CDMA module  410  or the GSM module  420  is enabled with the R-UIM card or the SIM card. If two single-mode subscriber identity cards are detected to be a SIM card and an R-UIM card, or if only one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  400  is determined to be a double communication mode in which the functionalities of wireless transceiving of the CDMA module  410  and the GSM module  420  are enabled with the R-UIM card and the SIM card, respectively, or enabled with two subscriber numbers read from the dual-mode subscriber identity card, respectively. If two single-mode subscriber identity cards are detected to be two SIM cards or two R-UIM cards, the working mode of the MS  400  is determined to be a double communication mode in which the functionality of wireless transceiving of the CDMA module  410  is enabled with the two R-UIM cards separately or the functionality of wireless transceiving of the GSM module  420  is enabled with the two SIM cards separately. If one single-mode subscriber identity card is detected to be a SIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  400  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  410  is enabled with one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM module  420  is enabled with the SIM card and the other subscriber number read from the dual-mode subscriber identity card. If one single-mode subscriber identity card is detected to be an R-UIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  400  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  410  is enabled with the R-UIM card and one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM module  420  is enabled with the other subscriber number read from the dual-mode subscriber identity card. If two dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected, the working mode of the MS  400  is determined to be a quadruple communication mode in which the functionality of wireless transceiving of the CDMA module  410  is enabled with two subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM module  420  is enabled with the other two subscriber numbers read from the dual-mode subscriber identity cards, respectively. To further clarify, in order to enable the functionality of wireless transceiving of the CDMA module  410  or the GSM module  420 , the GSM module  410  reads the subscriber information stored in the detected subscriber identity card(s), and further transfers the subscriber information concerning the CDMA module  410  to the CDMA module  410  if one of the detected subscriber identity cards contains a subscriber number for the CDMA module  410 . In addition, the GSM module  420  may receive subscriber information concerning the CDMA module  410  from the CDMA module  410  and store the received subscriber information to the R-UIM card(s) or the dual-mode subscriber identity card(s). In another embodiment, the working mode of the MS  400  may be determined according to the previously stored working mode, or the user may manually input his/her selection for the working mode of the MS  400 . Alternatively, the working mode of the MS  400  may be determined according to any combination of the number and type of the detected subscriber identity cards, the previously stored working mode, and the user selection. 
         [0038]      FIG. 5A  is a block diagram illustrating the architecture of an MS with two card slots according to still another embodiment of the invention. The MS  500  comprises a CDMA module  510 , and a GSM/UTRA module  520  coupled with two card slots  531  and  532 . The CDMA module  510  may provide the functionality of wireless transceiving in compliance with any combination of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies, while the GSM/UTRA module  520  may provide the functionality of wireless transceiving in compliance with any combination of the GSM, GPRS, EDGE, and UTRA technologies. The UTRA technology may refer to the UTRA-FDD (including release 99, release 4, release 5, or release 6), or UTRA-TDD HCR or LCR (including release 99, release 4, release 5, or release 6). Particularly, the CDMA module  510  and the GSM/UTRA module  520  are coupled with the RF modules  511  and  521 , respectively, wherein the RF modules  511  and  521  are further coupled with the antenna  512  and  522 , respectively. In other embodiments, the CDMA module  510  may be further coupled to one or more extra sets of an RF module and an antenna (not shown) for increasing the data rate of the wireless transceiving from and to the CDMA module  510 , and likewise, the GSM/UTRA module  520  may be further coupled to one or more extra sets of an RF module and an antenna (not shown) for increasing the data rate of the wireless transceiving of the UTRA signals from and to the GSM/UTRA module  520 , and the invention is not limited thereto. Note that, in this embodiment, the CDMA module  510  and the GSM/UTRA module  520  are configured as a slave and a master, respectively. That is, the GSM/UTRA module  520  is responsible for detecting the number and type of subscriber identity cards inserted in the card slots  531  and  532 , and for activating the CDMA module  510  to enter the standby mode in which the functionality of wireless transceiving is enabled, if one of the detected subscriber identity cards contains a subscriber number for the CDMA module  510 . As a slave, the CDMA module  510  may be initially configured to be off, and later switched to be on to enter the standby mode when activated by the GSM/UTRA module  520 . As a master, the GSM/UTRA module  520  determines the working mode of the MS  500  according to the number and type of the detected subscriber identity cards. For example, if only one single-mode subscriber identity card is detected to be a SIM/USIM card or an R-UIM card, the working mode of the MS  500  is determined to be a single mode in which the functionality of wireless transceiving of the CDMA module  510  or the GSM/UTRA module  520  is enabled. Specifically, for the case where the single-mode subscriber identity card is a SIM card, only the functionality of wireless transceiving in compliance with the GSM/GPRS/EDGE technology is enabled in the GSM/UTRA module  520 ; and for the case where the single-mode subscriber identity card is a USIM card, only the functionality of wireless transceiving in compliance with the UTRA technology is enabled in the GSM/UTRA module  520 . 
         [0039]    Furthermore, if two single-mode subscriber identity cards are detected to be a SIM/USIM card and an R-UIM card, or if only one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE/UTRA and the IS-95/CDMA2000 1×/CDMA2000 1×EV-DO technologies is detected, the working mode of the MS  500  is determined to be a double communication mode in which the functionalities of wireless transceiving of the CDMA module  510  and the GSM/UTRA module  520  are enabled with the SIM/USIM card and the R-UIM card, respectively, or enabled with two subscriber identity cards read from the dual-mode subscriber identity card, respectively. If two single-mode subscriber identity cards are detected to be two SIM/USIM cards or two R-UIM cards, the working mode of the MS  500  is determined to be a double communication mode in which the functionality of wireless transceiving of the CDMA module  510  is enabled with the R-UIM cards separately or the functionality of wireless transceiving of the GSM/UTRA module  520  is enabled with the SIM/USIM cards separately. If one single-mode subscriber identity card is detected to be a SIM/USIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE/UTRA and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  500  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  510  is enabled with one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM/UTRA module  520  is enabled with the SIM/USIM card and the other subscriber number read from the dual-mode subscriber identity card. If one single-mode subscriber identity card is detected to be an R-UIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE/UTRA and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  500  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  510  is enabled with the R-UIM card and one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM/UTRA module  520  is enabled with the other subscriber number read from the dual-mode subscriber identity card. If two dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE/UTRA and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected, the working mode of the MS  500  is determined to be a quadruple communication mode in which the functionality of wireless transceiving of the CDMA module  510  is enabled with two subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM/UTRA module  520  is enabled with the other two subscriber numbers read from the dual-mode subscriber identity cards, respectively. To further clarify, in order to enable the functionality of wireless transceiving of the CDMA module  510  or the GSM/UTRA module  520 , the GSM/UTRA module  510  reads the subscriber information stored in the detected subscriber identity card(s), and further transfers the subscriber information concerning the CDMA module  510  to the CDMA module  510  if one of the detected subscriber identity cards contains a subscriber number for the CDMA module  510 . In addition, the GSM/UTRA module  520  may receive subscriber information concerning the CDMA module  510  from the CDMA module  510  and store the received subscriber information to the R-UIM card(s) or the dual-mode subscriber identity card(s). In another embodiment, the working mode of the MS  500  may be determined according to the previously stored working mode, or the user may manually input his/her selection for the working mode of the MS  500 . Alternatively, the working mode of the MS  500  may be determined according to any combination of the number and type of the detected subscriber identity cards, the previously stored working mode, and the user selection. Note that, in one embodiment, the GSM/UTRA module  520  may be replaced with a combo communication module (denoted as a GSM/UTRA/LTE module  530 ) integrating the LTE module into the GSM/UTRA module  520 , as shown in  FIG. 5B , wherein only the functionality of wireless transceiving in compliance with the LTE technology is enabled in the GSM/UTRA/LTE module  530  if one of the detected subscriber identity contains a subscriber number for the LTE technology. The LTE technology may also refer to the LTE-Advanced, TD-LTE, or TD-LTE-Advanced technology. Alternatively, in another embodiment, the CDMA module  510  may be replaced with a combo communication module (denoted as a CDMA/LTE module  540 ) integrating the LTE module into the CDMA module  510 , as shown in  FIG. 5C , wherein only the functionality of wireless transceiving in compliance with the LTE technology is enabled in the CDMA/LTE module  540  if one of the detected subscriber identity contains a subscriber number for the LTE technology. For those skilled in the art, modifications to the operations and configurations of the GSM/UTRA/LTE module  530  and the CDMA/LTE module  540  may be contemplated according to the embodiment described above with respect to  FIG. 5A . 
         [0040]      FIG. 6A  is a block diagram illustrating the architecture of an MS with three card slots according to an embodiment of the invention. Similar to  FIGS. 2 and 4 , the MS  600  also comprises a CDMA module  610  and a GSM module  620 . However, there are three card slots in the MS  600 , wherein the card slot  631  is coupled to the CDMA module  610  and the card slots  632  and  633  are coupled to the GSM module  620 . The CDMA module  610  may provide the functionality of wireless transceiving in compliance with any combination of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies, while the GSM module  620  may provide the functionality of wireless transceiving in compliance with any combination of the GSM, GPRS, and EDGE technologies. Particularly, the CDMA module  610  and the GSM module  620  are coupled with the RF modules  611  and  621 , respectively, wherein the RF modules  611  and  621  are further coupled with the antenna  612  and  622 , respectively. In other embodiments, the CDMA module  610  may be further coupled to one or more extra sets of an RF module and an antenna (not shown) for increasing the data rate of the wireless transceiving from and to the CDMA module  610 , and the invention is not limited thereto. Note that, in this embodiment, the CDMA module  610  and the GSM module  620  may be configured as a master and a slave, respectively, or the other way around, and both the master and slave need to detect the number and type of the subscriber identity cards inserted in the coupled card slot(s). For the case where the CDMA module  610  is configured as a master and the GSM module  620  is configured as a slave, the CDMA module  610  detects the number and type of the subscriber identity card inserted in the card slot  631  and receives information concerning the number and type of the subscriber identity cards inserted in the card slots  632  and  633  from the GSM module  620 . For the case where the CDMA module  610  is configured as a slave and the GSM module  620  is configured as a master, the GSM module  620  detects the number and type of the subscriber identity cards inserted in the card slots  632  and  633  and receives information concerning the number and type of the subscriber identity card inserted in the card slot  631  from the CDMA module  610 . According to the total number and type of the subscriber identity cards inserted in the card slots  631  to  633 , the master then determines the working mode of the MS  600 . Also, the master is responsible for activating the slave to enter the standby mode in which the functionality of wireless transceiving is enabled, if one of the detected subscriber identity cards contains a subscriber number for the slave. The slave may be initially configured to be off, and later switched to be on to enter the standby mode when activated by the master. 
         [0041]    To further clarify, if only one single-mode subscriber identity card is detected to be a SIM card or an R-UIM card, the working mode of the MS  600  is determined to be a single communication mode in which the functionality of wireless transceiving of the CDMA module  610  or the GSM module  620  is enabled. If two single-mode subscriber identity cards are detected to be a SIM card and an R-UIM card, or if only one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE/UTRA and the IS-95/CDMA2000 1×/CDMA2000 1×EV-DO technologies is detected, the working mode of the MS  600  is determined to be a double communication mode in which the functionalities of wireless transceiving of the CDMA module  610  and the GSM module  620  are enabled with the R-UIM card and the SIM card, respectively, or enabled with two subscriber numbers read from the dual-mode subscriber identity card. If two single-mode subscriber identity cards are detected to be two SIM cards or two R-UIM cards, the working mode of the MS  600  is determined to be a double communication mode in which the functionality of wireless transceiving of the CDMA module  610  is enabled with the R-UIM cards separately or the functionality of wireless transceiving of the GSM/UTRA module  620  is enabled with the SIM cards separately. If one single-mode subscriber identity card is detected to be a SIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  600  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  610  is enabled with one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM module  620  is enabled with the SIM card and the other subscriber number read from the dual-mode subscriber identity card. If one single-mode subscriber identity card is detected to be an R-UIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  600  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  610  is enabled with the R-UIM card and one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM module  620  is enabled with the other subscriber number read from the dual-mode subscriber identity card. If two dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected, the working mode of the MS  600  is determined to be a quadruple communication mode in which the functionality of wireless transceiving of the CDMA module  610  is enabled with two subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM module  620  is enabled with the other two subscriber numbers read from the dual-mode subscriber identity cards, respectively. 
         [0042]    Particularly, the MS  600  further provides multiple standby modes of the CDMA module  610  and the GSM module  620  for three separate subscriber identity cards. Specifically, if three single-mode subscriber identity cards are detected to be three SIM cards or three R-UIM cards, the working mode of the MS  600  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  610  is enabled with the three R-UIM cards separately, or the functionality of wireless transceiving of the GSM module  620  is enabled with the three SIM cards separately. If three single-mode subscriber identity cards are detected to be two SIM cards and one R-UIM card or one SIM card and two R-UIM cards, the working mode of the MS  600  is determined to be a triple communication mode in which the functionalities of wireless transceiving of the CDMA module  610  and the GSM module  620  are enabled with the R-UIM card(s) and the SIM card(s), respectively. If two dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected and one single-mode subscriber identity card is detected to be a SIM card, the working mode of the MS  600  is determined to be a quintuple communication mode in which the functionality of wireless transceiving of the CDMA module  610  is enabled with two subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM module  620  is enabled with the SIM card and the other two subscriber numbers read from the dual-mode subscriber identity cards, respectively. If two dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected and one single-mode subscriber identity card is detected to be an R-UIM card, the working mode of the MS  600  is determined to be a quintuple communication mode in which the functionality of wireless transceiving of the CDMA module  610  is enabled with the R-UIM card and two subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM module  620  is enabled with the other two subscriber numbers read from the dual-mode subscriber identity cards, respectively. If three dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected, the working mode of the MS  600  is determined to be a sextuple communication mode in which the functionality of wireless transceiving of the CDMA module  610  is enabled with three subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM module  620  is enabled with the other three subscriber numbers read from the dual-mode subscriber identity cards, respectively. Specifically, in order to enable the functionality of wireless transceiving of the CDMA module  610  or the GSM module  620 , the master reads the subscriber information stored in the detected subscriber identity card(s), and further transfers the subscriber information concerning the slave to the slave if one of the detected subscriber identity cards contains a subscriber number for the slave. In addition, the working mode of the MS  600  may be determined according to the previously stored working mode, or the user may manually input his/her selection for the working mode of the MS  600 . Alternatively, the working mode of the MS  600  may be determined according to any combination of the number and type of the detected subscriber identity cards, the previously stored working mode, and the user selection. Note that, in another embodiment, the card slots  631  to  633  may be coupled to the CDMA module  610  and GSM module  620  differently, as shown in  FIG. 6B , wherein the card slots  631  and  632  are coupled to the CDMA module  610  while the card slot  633  is coupled to the GSM module  620 . For those skilled in the art, modifications to the operations and configurations of the CDMA module  610  and the GSM module  620  with respect to different arrangements of the card slots  631  to  633  may be contemplated according to the embodiment described above with respect to  FIG. 6A . 
         [0043]      FIG. 7A  is a block diagram illustrating the architecture of an MS with three card slots according to another embodiment of the invention. Similar to  FIGS. 6A and 6B , the MS  700  also comprises a CDMA module  710 , a GSM module  720 , and three card slots  731  to  733 . However, in the MS  700 , all of the card slots  731  to  733  are coupled to the GSM module  720 . The CDMA module  710  may provide the functionality of wireless transceiving in compliance with any combination of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies, while the GSM module  720  may provide the functionality of wireless transceiving in compliance with any combination of the GSM, GPRS, and EDGE technologies. Particularly, the CDMA module  710  and the GSM module  720  are coupled with the RF modules  711  and  721 , respectively, wherein the RF modules  711  and  721  are further coupled with the antenna  712  and  722 , respectively. In other embodiments, the CDMA module  710  may be further coupled to one or more extra sets of an RF module and an antenna (not shown) for increasing the data rate of the wireless transceiving from and to the CDMA module  710 , and the invention is not limited thereto. Note that, in this embodiment, the CDMA module  710  and the GSM module  720  are configured as a slave and a master, respectively. As a master, the GSM module  720  is responsible for detecting the number and type of the subscriber identity cards inserted in the card slots  731  to  733 , and for activating the CDMA module  710  to enter the standby mode in which the functionality of wireless transceiving is enabled, if one of the detected subscriber identity cards contains a subscriber number for the CDMA module  710 . The CDMA module  710  may be initially configured to be off, and later switched to be on to enter the standby mode when activated by the GSM module  720 . 
         [0044]    To further clarify, if only one single-mode subscriber identity card is detected to be a SIM card or an R-UIM card, the working mode of the MS  700  is determined to be a single mode in which the functionality of wireless transceiving of the CDMA module  710  or the GSM module  720  is enabled with the R-UIM card or the SIM card. If two single-mode subscriber identity cards are detected to be a SIM card and an R-UIM card, or if only one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  700  is determined to be a double communication mode in which the functionalities of wireless transceiving of the CDMA module  710  and the GSM module  720  are enabled with the R-UIM card and the SIM card, respectively, or enabled with two subscriber numbers read from the dual-mode subscriber identity card, respectively. If two single-mode subscriber identity cards are detected to be two SIM cards or two R-UIM cards, the working mode of the MS  700  is determined to be a double communication mode in which the functionality of wireless transceiving of the CDMA module  710  is enabled with the two R-UIM cards separately, or the functionality of wireless transceiving of the GSM module  720  is enabled with the two SIM cards separately. If one single-mode subscriber identity card is detected to be a SIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  700  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  710  is enabled with one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM module  720  is enabled with the SIM card and the other subscriber number read from the dual-mode subscriber identity card. If one single-mode subscriber identity card is detected to be an R-UIM card and one dual-mode subscriber identity card supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies is detected, the working mode of the MS  700  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  710  is enabled with the R-UIM card and one subscriber number read from the dual-mode subscriber identity card and the functionality of wireless transceiving of the GSM module  720  is enabled with the other subscriber number read from the dual-mode subscriber identity card. If two dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected, the working mode of the MS  700  is determined to be a quadruple communication mode in which the functionality of wireless transceiving of the CDMA module  710  is enabled with two subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM module  720  is enabled with the other two subscriber numbers read from the dual-mode subscriber identity cards, respectively. 
         [0045]    Particularly, the MS  700  further provides multiple standby modes of the CDMA module  710  and the GSM module  720  for three separate subscriber identity cards. Specifically, if three single-mode subscriber identity cards are detected to be three SIM cards or three R-UIM cards, the working mode of the MS  700  is determined to be a triple communication mode in which the functionality of wireless transceiving of the CDMA module  710  is enabled with the three R-UIM cards separately, or the functionality of wireless transceiving of the GSM module  720  is enabled with the three SIM cards separately. If three single-mode subscriber identity cards are detected to be two SIM cards and one R-UIM card or one SIM card and two R-UIM cards, the working mode of the MS  700  is determined to be a triple communication mode in which the functionalities of wireless transceiving of the CDMA module  710  and the GSM module  720  are enabled with the R-UIM card(s) and the SIM card(s), respectively. If two dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected and one single-mode subscriber identity card is detected to be a SIM card, the working mode of the MS  700  is determined to be a quintuple communication mode in which the functionality of wireless transceiving of the CDMA module  710  is enabled with two subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM module  720  is enabled with the SIM card and the other two subscriber numbers read from the dual-mode subscriber identity cards, respectively. If two dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected and one single-mode subscriber identity card is detected to be an R-UIM card, the working mode of the MS  700  is determined to be a quintuple communication mode in which the functionality of wireless transceiving of the CDMA module  710  is enabled with the R-UIM card and two subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM module  720  is enabled with the other two subscriber numbers read from the dual-mode subscriber identity cards, respectively. If three dual-mode subscriber identity cards supporting both the GSM/GPRS/EDGE and the IS-95/CDMA2000 1×/CDMA2000 1× EV-DO technologies are detected, the working mode of the MS  700  is determined to be a sextuple communication mode in which the functionality of wireless transceiving of the CDMA module  710  is enabled with three subscriber numbers read from the dual-mode subscriber identity cards, respectively, and the functionality of wireless transceiving of the GSM module  720  is enabled with the other three subscriber numbers read from the dual-mode subscriber identity cards, respectively. Specifically, in order to enable the functionality of wireless transceiving of the CDMA module  710  or the GSM module  720 , the GSM module  710  reads the subscriber information stored in the detected subscriber identity card(s), and further transfers the subscriber information concerning the CDMA module  710  to the CDMA module  710  if one of the detected subscriber identity cards contains a subscriber number for the CDMA module  710 . In addition, the GSM module  720  may receive subscriber information concerning the CDMA module  710  from the CDMA module  710  and store the received subscriber information to the R-UIM card(s) or the dual-mode subscriber identity card(s). In another embodiment, the working mode of the MS  700  may be determined according to the previously stored working mode, or the user may manually input his/her selection for the working mode of the MS  700 . Alternatively, the working mode of the MS  700  may be determined according to any combination of the number and type of the detected subscriber identity cards, the previously stored working mode, and the user selection. Note that, in another embodiment, the card slots  731  to  733  may be coupled to the CDMA module  710  instead of the GSM module  720 , as shown in  FIG. 7B , wherein the CDMA module  710  and the GSM module  720  are instead configured to be a master and a slave, respectively. For those skilled in the art, modifications to the operations and configurations of the CDMA module  710  and the GSM module  720  may be contemplated according to the embodiment described above with respect to  FIG. 7A . 
         [0046]      FIG. 8  is a block diagram illustrating the architecture of an MS with three card slots according to yet another embodiment of the invention. Unlike  FIGS. 7A and 7B , the CDMA module and the GSM module are integrated into a CDMA+GSM combo module  810 , and three card slots  821  to  823  are coupled to the CDMA+GSM combo module  810 . The CDMA+GSM combo module  810  may provide the functionalities of wireless transceiving in compliance with both the CDMA technology (including any combination of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies) and the GSM/GPRS/EDGE technology (including any combination of the GSM, GPRS, and EDGE technologies). Particularly, the CDMA+GSM combo module  810  is coupled with the RF modules  811  and  812 , wherein the RF modules  811  and  812  are further coupled with the antenna  813  and  814  for transceiving CDMA and GSM/GPRS/EDGE signals, respectively. In other embodiments, the CDMA+GSM combo module  810  may be further coupled to one or more extra sets of an RF module and an antenna (not shown) for increasing the data rate of the wireless transceiving for CDMA, and the invention is not limited thereto. Since the CDMA module and the GSM module are integrated into the CDMA+GSM combo module  810 , the CDMA+GSM combo module  810  is responsible for detecting the number and type of the subscriber identity cards inserted in the card slots  821  to  823 , and for enabling the functionality of wireless transceiving for CDMA and/or GSM/GPRS/EDGE. For example, the functionality of wireless transceiving for CDMA is enabled if one of the detected subscriber identity cards contains a subscriber number for CDMA, and the functionality of wireless transceiving for GSM/GPRS/EDGE is enabled if one of the detected subscriber identity cards contains a subscriber number for GSM/GPRS/EDGE. The functionalities of wireless transceiving for CDMA signals and GSM signals may be initially configured to be off, and later switched to be on when enabled by the CDMA+GSM combo module  810 . Regarding the operations of whether to enable the functionalities of wireless transceiving for CDMA signals and GSM signals, reference may be made to the detailed descriptions with respect to  FIGS. 7A and 7B . 
         [0047]      FIG. 9  is a block diagram illustrating the architecture of an MS with an application processor according to an embodiment of the invention. As shown in  FIG. 9 , the MS  900  comprises two communication modules  910  and  920 , and an application processor  930  for coordinating the operations of the communication modules  910  and  920  according to the subscriber identity cards inserted in the card slots  941  and  942 . In this embodiment, there are two card slots  941  and  942  coupled to the application processor  930 , while in other embodiments, there may be more than two card slots coupled to the application processor  930 , and the invention is not limited thereto. The communication module  910  may provide the functionality of wireless transceiving in compliance with the CDMA technology (including any combination of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies), while the communication module  920  may provide the functionality of wireless transceiving in compliance with the GSM technology (including any combination of the GSM, GPRS, and EDGE technologies), the UTRA or LTE technology. The communication modules  910  and  920  are coupled with the RF modules  911  and  921 , respectively, wherein the RF modules  911  and  921  are further coupled with the antenna  912  and  922 , respectively. In other embodiments, each of the communication modules  910  and  920  may be further coupled to one or more extra sets of an RF module and an antenna (not shown) for increasing the data rate of the wireless transceiving, and the invention is not limited thereto. The application processor  930  may be a general-purpose processor, a Micro Control Unit (MCU), or others, which loads and executes a series of program codes from a memory unit (not shown) or storage device (not shown) to provide control of the communication modules  910  and  920  in the MS  900 . Specifically, the application processor  930  is responsible for detecting the number and type of the subscriber identity cards inserted in the card slots  941  and  942 , and for activating the communication modules  910  and  920  to enter the standby mode in which the functionality of wireless transceiving is enabled, if the detected subscriber identity card(s) contains subscriber numbers for the communication modules  910  and  920 . Regarding the operations of whether to activate the communication modules  910  and/or  920 , references may be made to the detailed descriptions with respect to  FIGS. 2, 3A to 3C, 4, and 5A to 5C . Alternatively, for the case where 3 card slots are coupled to the application processor  930 , references regarding the operations of whether to activate the communication modules  910  and/or  920  may be made to the detailed descriptions with respect to  FIGS. 6A, 6B, 7A, 7B, and 8 . 
         [0048]      FIG. 10  is a flow chart illustrating an embodiment of the method for coordinating the operations between two communication modules with respect to the architectures shown in  FIGS. 2 and 4 . In this embodiment, the method is applied in a wireless communications device, such as the MS  200  or the MS  400 , which comprises two card slots, a CDMA module, and a GSM module, wherein each of the CDMA module and the GSM module is coupled with a respective set of an RF module and an antenna for wireless transceiving. To begin, the wireless communications device is powered on and a series of initialization processes, including booting up of the operating system, initializing of the master among the communication modules, and activating of the coupled functional modules (such as the RF module and the antenna coupled with the master), etc., are performed (step S 1001 ). For example, the master may be the CDMA module  210  in the embodiment shown in  FIG. 2 , or the master may be the GSM module  420  in the embodiment shown in  FIG. 4 . After the initialization processes are finished, the wireless communications device may prompt the user on whether to select the previously stored working mode or not (step S 1002 ). The previously stored working mode may refer to the working mode used before the last power-off operation of the wireless communications device. If the user selects the previously stored working mode, the master among the communication modules activates the slave accordingly (step S 1003 ). If the user does not select the previously stored working mode, the master among the communication modules detects the number of subscriber identity cards inserted in the card slots (step S 1004 ). For the case where only 1 subscriber identity card is detected, the master then determines the type of the detected subscriber identity card (step S 1005 ). If it is a SIM card, the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with the SIM card (step S 1006 ). If it is an R-UIM card, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with the R-UIM card (step S 1007 ). Otherwise, if it is a dual-mode subscriber identity card, the wireless communications device further prompts the user to select the communication mode (step S 1008 ). Specifically, the dual-mode subscriber identity card comprises two subscriber numbers for CDMA and GSM technologies, respectively. If the user selects a single communication mode with the GSM module, the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with the subscriber number for GSM technology read from the dual-mode subscriber identity card (step S 1009 ). If the user selects a single communication mode with the CDMA module, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with the subscriber number for CDMA technology read from the dual-mode subscriber identity card (step S 1010 ). Otherwise, if the user selects a double communication mode, both the CDMA module and the GSM module are activated or turned on and the functionalities of wireless transceiving therein are enabled with the two subscriber numbers read from the dual-mode subscriber identity card (step S 1011 ). 
         [0049]    Subsequent to step S 1004 , if two subscriber identity cards are detected, the master continues to prompt the user to select the communication mode (step S 1012 ). Specifically, the user may select the communication mode according to any combination of the number and type of the detected subscriber identity cards, and the type of subscriber numbers. If the user selects a single communication mode, the master further determines whether the single communication mode is selected with the GSM module or the CDMA module (step S 1013 ). If the single communication mode is selected with the GSM module (i.e., a SIM card, or a subscriber number for GSM in a dual-mode subscriber identity card is selected by user), the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM card or the subscriber number for GSM technology read from a dual-mode subscriber identity card (step S 1014 ). If the single communication mode is selected with the CDMA module (i.e., an R-UIM card, or a subscriber number for CDMA in a dual-mode subscriber identity card is selected by user), the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card or the subscriber number for CDMA technology read from a dual-mode subscriber identity card (step S 1015 ). 
         [0050]    Subsequent to step S 1012 , if the user selects a double communication mode, the master further determines the type of the double communication mode (step S 1016 ). If the type of the double communication mode is selected with only the GSM module, the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with two SIM cards, two subscriber numbers for GSM technology read from a dual-mode subscriber identity card, or one SIM card and one subscriber number for GSM technology read from a dual-mode subscriber identity card, respectively (step S 1017 ). If the type of the double communication mode is selected with only the CDMA module, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two R-UIM cards, two subscriber numbers for CDMA technology read from a dual-mode subscriber identity card, or an R-UIM card and one subscriber number for CDMA technology read from a dual-mode subscriber identity card, respectively (step S 1018 ). Otherwise, if the type of the double communication mode is selected with both the CDMA module and the GSM module, the CDMA module and the GSM module are activated or turned on and the functionalities of wireless transceiving therein are enabled with an R-UIM card and a SIM card, two subscriber numbers for CDMA and GSM read from a dual-mode subscriber identity card, one subscriber number for CDMA technology read from a dual-mode subscriber identity card and a SIM card, or an R-UIM card and one subscriber number for GSM technology read from a dual-mode subscriber identity card, respectively (step S 1019 ). 
         [0051]    Subsequent to step S 1012 , if the user selects a triple communication mode, the master further determines the type of the triple communication mode (step S 1020 ). If the type of the triple communication mode is selected with double GSM and single CDMA, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card or one subscriber number for CDMA technology read from a dual-mode subscriber identity card, while the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM card and one subscriber number for GSM technology read from a dual-mode subscriber identity card, or two subscriber numbers for GSM technology read from two dual-mode subscriber identity cards, respectively (step S 1021 ). If the type of the triple communication mode is selected with single GSM and double CDMA, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card and one subscriber number for CDMA technology read from a dual-mode subscriber identity card, or two subscriber numbers for CDMA technology read from two dual-mode subscriber identity cards, respectively, while the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM card or one subscriber number for GSM technology read from a dual-mode subscriber identity card (step S 1022 ). Subsequent to step S 1012 , if the user selects a quadruple communication mode, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two subscriber numbers for CDMA technology read from two dual-mode subscriber identity cards, respectively, while the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with two subscriber numbers for GSM technology read from two dual-mode subscriber identity cards, respectively (step S 1023 ). 
         [0052]      FIG. 11  is a flow chart illustrating an embodiment of the method for coordinating the operations between two communication modules with respect to the architectures shown in  FIGS. 3A and 5A . In this embodiment, the method is applied in a wireless communications device, such as the MS  300  or the MS  500 , which comprises two card slots, a CDMA module, and a GSM/UTRA module, wherein each of the CDMA module and the GSM/UTRA module is coupled with a respective set of an RF module and an antenna for wireless transceiving. To begin, the wireless communications device is powered on and a series of initialization processes, including booting up of the operating system, initializing of the master among the communication modules, and activating of the coupled functional modules (such as the RF module and the antenna coupled with the master), etc., are performed (step S 1101 ). For example, the master may be the CDMA module  310  in the embodiment shown in  FIG. 3A , or the master may be the GSM/UTRA module  520  in the embodiment shown in  FIG. 5A . After the initialization processes are finished, the wireless communications device may prompt the user on whether to select the previously stored working mode or not (step S 1102 ). The previously stored working mode may refer to the working mode used before the last power-off operation of the wireless communications device. If the user selects the previously stored working mode, the master among the communication modules activates the slave accordingly (step S 1103 ). If the user does not select the previously stored working mode, the master among the communication modules detects the number of subscriber identity cards inserted in the card slots (step S 1104 ). For the case where only 1 subscriber identity card is detected, the master then determines the type of the detected subscriber identity card (step S 1105 ). If it is a SIM/USIM card, the GSM/UTRA module is activated or turned on and the functionality of wireless transceiving therein is enabled with the SIM/USIM card (step S 1106 ). Specifically, if the detected subscriber identity card is a SIM card, then only the functionality of wireless transceiving in compliance with the GSM/GPRS/EDGE technology is enabled in the GSM/UTRA module. Otherwise, if the detected subscriber identity card is a USIM card, then only the functionality of wireless transceiving in compliance with the UTRA technology is enabled in the GSM/UTRA module. If the detected subscriber identity card is an R-UIM card, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with the R-UIM card (step S 1107 ). Otherwise, if it is a dual-mode subscriber identity card, the wireless communications device further prompts the user to select the communication mode (step S 1108 ). Specifically, the dual-mode subscriber identity card comprises two subscriber numbers for CDMA and GSM technologies, respectively. If the user selects a single communication mode with the GSM/UTRA module, the GSM/UTRA module is activated or turned on and the functionality of wireless transceiving therein is enabled with the subscriber number for GSM/UTRA read from the dual-mode subscriber identity card (step S 1109 ). If the user selects a single communication mode with the CDMA module, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with the subscriber number for CDMA technology read from the dual-mode subscriber identity card (step S 1110 ). Otherwise, if the user selects a double communication mode, both the CDMA module and the GSM/UTRA module are activated or turned on and the functionalities of wireless transceiving therein are enabled with the two subscriber numbers read from the dual-mode subscriber identity card (step S 1111 ). 
         [0053]    Subsequent to step S 1104 , if two subscriber identity cards are detected, the master continues to prompt the user to select the communication mode (step S 1112 ). Specifically, the user may select the communication mode according to any combination of the number and type of the detected subscriber identity cards, and the type of subscriber numbers. If the user selects a single communication mode, the master further determines whether the single communication mode is selected with the GSM/UTRA module or the CDMA module (step S 1113 ). If the single communication mode is selected with the GSM/UTRA module (i.e., a SIM/USIM card, or a subscriber number for GSM/UTRA in a dual-mode subscriber identity card is selected by user), the GSM/UTRA module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM/USIM card or the subscriber number for GSM/UTRA read from a dual-mode subscriber identity card (step S 1114 ). If the single communication mode is selected with the CDMA module (i.e., an R-UIM card, or a subscriber number for CDMA in a dual-mode subscriber identity card is selected by user), the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card or the subscriber number for CDMA technology read from a dual-mode subscriber identity card (step S 1115 ). 
         [0054]    Subsequent to step S 1112 , if the user selects a double communication mode, the master further determines the type of the double communication mode (step S 1116 ). If the type of the double communication mode is selected with only the GSM/UTRA module, the GSM/UTRA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two SIM/USIM cards, two subscriber numbers for GSM/UTRA read from a dual-mode subscriber identity card, or one SIM/USIM card and one subscriber number for GSM/UTRA read from a dual-mode subscriber identity card, respectively (step S 1117 ). If the type of the double communication mode is selected with only the CDMA module, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two R-UIM cards, two subscriber numbers for CDMA technology read from a dual-mode subscriber identity card, or an R-UIM card and one subscriber number for CDMA technology read from a dual-mode subscriber identity card, respectively (step S 1118 ). Otherwise, if the type of the double communication mode is selected with both the CDMA module and the GSM/UTRA module, the CDMA module and the GSM/UTRA module are activated or turned on and the functionalities of wireless transceiving therein are enabled with an R-UIM card and a SIM/USIM card, two subscriber numbers for CDMA and GSM/UTRA read from a dual-mode subscriber identity card, one subscriber number for CDMA technology read from a dual-mode subscriber identity card and a SIM/USIM card, or an R-UIM card and one subscriber number for GSM/UTRA read from a dual-mode subscriber identity card, respectively (step S 1119 ). 
         [0055]    Subsequent to step S 1112 , if the user selects a triple communication mode, the master further determines the type of the triple communication mode (step S 1120 ). If the type of the triple communication mode is selected with double GSM/UTRA and single CDMA, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card or one subscriber number for CDMA technology read from a dual-mode subscriber identity card, while the GSM/UTRA module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM/USIM card and one subscriber number for GSM/UTRA read from a dual-mode subscriber identity card, or two subscriber numbers for GSM/UTRA read from two dual-mode subscriber identity cards, respectively (step S 1121 ). Specifically, the functionality of wireless transceiving enabled in the GSM/UTRA module is in compliance with any two of the GSM, GPRS, EDGE, UTRA-FDD (including release 99, release 4, release 5, or release 6), and UTRA-TDD HCR or LCR (including release 99, release 4, release 5, or release 6) technologies. If the type of the triple communication mode is selected with single GSM/UTRA and double CDMA, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card and one subscriber number for CDMA technology read from a dual-mode subscriber identity card, or two subscriber numbers for CDMA technology read from two dual-mode subscriber identity cards, respectively, while the GSM/UTRA module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM/USIM card or one subscriber number for GSM/UTRA read from a dual-mode subscriber identity card (step S 1122 ). Specifically, the functionality of wireless transceiving enabled in the CDMA module is in compliance with any two of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies. Subsequent to step S 1112 , if the user selects a quadruple communication mode, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two subscriber numbers for CDMA technology read from two dual-mode subscriber identity cards, respectively, while the GSM/UTRA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two subscriber numbers for GSM/UTRA read from two dual-mode subscriber identity cards, respectively (step S 1123 ). That is, the functionality of wireless transceiving enabled in the CDMA module is in compliance with any two of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies, and the functionality of wireless transceiving enabled in the GSM/UTRA module is in compliance with any two of the GSM, GPRS, EDGE, UTRA-FDD (including release 99, release 4, release 5, or release 6), and UTRA-TDD HCR or LCR (including release 99, release 4, release 5, or release 6) technologies. 
         [0056]      FIG. 12  is a flow chart illustrating an embodiment of the method for coordinating the operations between two communication modules with respect to the architectures shown in  FIGS. 3B and 5B . In this embodiment, the method is applied in a wireless communications device which comprises two card slots, a CDMA module, and a GSM/UTRA/LTE module, wherein each of the CDMA module and the GSM/UTRA/LTE module is coupled with a respective set of an RF module and an antenna for wireless transceiving. To begin, the wireless communications device is powered on and a series of initialization processes, including booting up of the operating system, initializing of the master among the communication modules, and activating of the coupled functional modules (such as the RF module and the antenna coupled with the master), etc., are performed (step S 1201 ). For example, the master may be the CDMA module  310  in the embodiment shown in  FIG. 3B , or the master may be the GSM/UTRA/LTE module  530  in the embodiment shown in  FIG. 5B . After the initialization processes are finished, the wireless communications device may prompt the user on whether to select the previously stored working mode or not (step S 1202 ). The previously stored working mode may refer to the working mode used before the last power-off operation of the wireless communications device. If the user selects the previously stored working mode, the master among the communication modules activates the slave accordingly (step S 1203 ). If the user does not select the previously stored working mode, the master among the communication modules detects the number of subscriber identity cards inserted in the card slots (step S 1204 ). For the case where only 1 subscriber identity card is detected, the master then determines the type of the detected subscriber identity card (step S 1205 ). If it is a SIM/USIM card, the GSM/UTRA/LTE module is activated or turned on and the functionality of wireless transceiving therein is enabled with the SIM/USIM card (step S 1206 ). Specifically, if the detected subscriber identity card is a SIM card, then only the functionality of wireless transceiving in compliance with the GSM/GPRS/EDGE technology is enabled in the GSM/UTRA module. Otherwise, if the detected subscriber identity card is a USIM card, then only the functionality of wireless transceiving in compliance with the UTRA or LTE technology is enabled in the GSM/UTRA/LTE module. If the detected subscriber identity card is an R-UIM card, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with the R-UIM card (step S 1207 ). Otherwise, if it is a dual-mode subscriber identity card, the wireless communications device further prompts the user to select the communication mode (step S 1208 ). Specifically, the dual-mode subscriber identity card comprises two subscriber numbers for CDMA and GSM/UTRA/LTE technologies, respectively. If the user selects a single communication mode with the GSM/UTRA/LTE module, the GSM/UTRA/LTE module is activated or turned on and the functionality of wireless transceiving therein is enabled with the subscriber number for GSM/UTRA/LTE read from the dual-mode subscriber identity card (step S 1209 ). If the user selects a single communication mode with the CDMA module, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with the subscriber number for CDMA technology read from the dual-mode subscriber identity card (step S 1210 ). Otherwise, if the user selects a double communication mode, both the CDMA module and the GSM/UTRA/LTE module are activated or turned on and the functionalities of wireless transceiving therein are enabled with the two subscriber numbers read from the dual-mode subscriber identity card (step S 1211 ). 
         [0057]    Subsequent to step S 1204 , if two subscriber identity cards are detected, the master continues to prompt the user to select the communication mode (step S 1212 ). Specifically, the user may select the communication mode according to any combination of the number and type of the detected subscriber identity cards, and the type of subscriber numbers. If the user selects a single communication mode, the master further determines whether the single communication mode is selected with the GSM/UTRA/UTRA module or the CDMA module (step S 1213 ). If the single communication mode is selected with the GSM/UTRA/LTE module (i.e., a SIM/USIM card, or a subscriber number for GSM/UTRA/LTE in a dual-mode subscriber identity card is selected by user), the GSM/UTRA/LTE module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM/USIM card or the subscriber number for GSM/UTRA/LTE read from a dual-mode subscriber identity card (step S 1214 ). If the single communication mode is selected with the CDMA module (i.e., an R-UIM card, or a subscriber number for CDMA in a dual-mode subscriber identity card is selected by user), the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card or the subscriber number for CDMA technology read from a dual-mode subscriber identity card (step S 1215 ). 
         [0058]    Subsequent to step S 1212 , if the user selects a double communication mode, the master further determines the type of the double communication mode (step S 1216 ). If the type of the double communication mode is selected with only the GSM/UTRA/LTE module, the GSM/UTRA/LTE module is activated or turned on and the functionality of wireless transceiving therein is enabled with two SIM/USIM cards, two subscriber numbers for GSM/UTRA/LTE read from a dual-mode subscriber identity card, or one SIM/USIM card and one subscriber number for GSM/UTRA/LTE read from a dual-mode subscriber identity card, respectively (step S 1217 ). If the type of the double communication mode is selected with only the CDMA module, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two R-UIM cards, two subscriber numbers for CDMA technology read from a dual-mode subscriber identity card, or an R-UIM card and one subscriber number for CDMA technology read from a dual-mode subscriber identity card, respectively (step S 1218 ). Otherwise, if the type of the double communication mode is selected with both the CDMA module and the GSM/UTRA/LTE module, the CDMA module and the GSM/UTRA/LTE module are activated or turned on and the functionalities of wireless transceiving therein are enabled with an R-UIM card and a SIM/USIM card, two subscriber numbers for CDMA and GSM/UTRA/LTE read from a dual-mode subscriber identity card, one subscriber number for CDMA technology read from a dual-mode subscriber identity card and a SIM/USIM card, or an R-UIM card and one subscriber number for GSM/UTRA/LTE read from a dual-mode subscriber identity card, respectively (step S 1219 ). 
         [0059]    Subsequent to step S 1212 , if the user selects a triple communication mode, the master further determines the type of the triple communication mode (step S 1220 ). If the type of the triple communication mode is selected with double GSM/UTRA/LTE and single CDMA, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card or one subscriber number for CDMA technology read from a dual-mode subscriber identity card, while the GSM/UTRA/LTE module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM/USIM card and one subscriber number for GSM/UTRA/LTE read from a dual-mode subscriber identity card, or two subscriber numbers for GSM/UTRA/LTE read from two dual-mode subscriber identity cards, respectively (step S 1221 ). Specifically, the functionality of wireless transceiving enabled in the GSM/UTRA/LTE module is in compliance with any two of the GSM, GPRS, EDGE, UTRA-FDD (including release 99, release 4, release 5, or release 6), UTRA-TDD HCR or LCR (including release 99, release 4, release 5, or release 6), and LTE technologies. If the type of the triple communication mode is selected with single GSM/UTRA/LTE and double CDMA, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card and one subscriber number for CDMA technology read from a dual-mode subscriber identity card, or two subscriber numbers for CDMA technology read from two dual-mode subscriber identity cards, respectively, while the GSM/UTRA/LTE module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM/USIM card or one subscriber number for GSM/UTRA/LTE read from a dual-mode subscriber identity card (step S 1222 ). Specifically, the functionality of wireless transceiving enabled in the CDMA module is in compliance with any two of the IS-95, CDMA2000 1×, and CDMA2000 1× EV-DO technologies. Subsequent to step S 1212 , if the user selects a quadruple communication mode, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two subscriber numbers for CDMA technology read from two dual-mode subscriber identity cards, respectively, while the GSM/UTRA/LTE module is activated or turned on and the functionality of wireless transceiving therein is enabled with two subscriber numbers for GSM/UTRA/LTE read from two dual-mode subscriber identity cards, respectively (step S 1223 ). That is, the functionality of wireless transceiving enabled in the CDMA module is in compliance with any two of the IS-95, CDMA2000 1×, and CDMA2000 1×EV-DO technologies, and the functionality of wireless transceiving enabled in the GSM/UTRA/LTE module is in compliance with any two of the GSM, GPRS, EDGE, UTRA-FDD (including release 99, release 4, release 5, or release 6), UTRA-TDD HCR or LCR (including release 99, release 4, release 5, or release 6), and LTE technologies. 
         [0060]      FIG. 13  is a flow chart illustrating an embodiment of the method for coordinating the operations between two communication modules with respect to the architectures shown in  FIGS. 6A, 6B, 7A, and 7B . In this embodiment, the method is applied in a wireless communications device, such as the MS  600  or the MS  700 , which comprises three card slots, a CDMA module, and a GSM module, wherein each of the CDMA module and the GSM module is coupled with a respective set of an RF module and an antenna for wireless transceiving. Similar to  FIG. 10 , a series of initialization processes are performed after the wireless communications device is powered on, and the user may select whether to use the previously stored working mode (step S 1301 ˜S 1302 ). If the user selects the previously stored working mode, the master among the communication modules activates the slave accordingly (step S 1303 ). For example, the master may be the CDMA module  610  or the GSM module  620  in the embodiment shown in  FIGS. 6A and 6B , or the master may be the CDMA module  710  in the embodiment shown in  FIG. 7A  or the master may be the GSM module  720  in the embodiment shown in  FIG. 7B . If the user does not select the previously stored working mode, the master detects the number of subscriber identity cards inserted in the card slots (step S 1304 ). For the case where only 1 subscriber identity card is detected, the master then determines the type of the detected subscriber identity card (step S 1305 ). If it is a SIM card, the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with the SIM card (step S 1306 ). If it is an R-UIM card, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with the R-UIM card (step S 1307 ). Otherwise, if it is a dual-mode subscriber identity card, the wireless communications device further prompts the user to select the communication mode (step S 1308 ). Specifically, the dual-mode subscriber identity card comprises two subscriber numbers for CDMA and GSM technologies, respectively. If the user selects a single communication mode with the GSM module, the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with the subscriber number for GSM technology read from the dual-mode subscriber identity card (step S 1309 ). If the user selects a single communication mode with the CDMA module, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with the subscriber number for CDMA technology read from the dual-mode subscriber identity card (step S 1310 ). Otherwise, if the user selects a double communication mode, both the CDMA module and the GSM module are activated or turned on and the functionalities of wireless transceiving therein are enabled with the two subscriber numbers read from the dual-mode subscriber identity card (step S 1311 ). 
         [0061]    Subsequent to step S 1304 , if two subscriber identity cards are detected, the master continues to prompt the user to select the communication mode (step S 1312 ). Specifically, the user may select the communication mode according to any combination of the number and type of the detected subscriber identity cards, and the type of subscriber numbers. If the user selects a single communication mode, the master further determines whether the single communication mode is selected with the GSM module or the CDMA module (step S 1313 ). If the single communication mode is selected with the GSM module (i.e., a SIM card, or a subscriber number for GSM in a dual-mode subscriber identity card is selected by user), the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM card or the subscriber number for GSM technology read from a dual-mode subscriber identity card (step S 1314 ). If the single communication mode is selected with the CDMA module (i.e., an R-UIM card, or a subscriber number for CDMA in a dual-mode subscriber identity card is selected by user), the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card or the subscriber number for CDMA technology read from a dual-mode subscriber identity card (step S 1315 ). 
         [0062]    Subsequent to step S 1312 , if the user selects a double communication mode, the master further determines the type of the double communication mode (step S 1316 ). If the type of the double communication mode is selected with only the GSM module, the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with two SIM cards, two subscriber numbers for GSM technology read from a dual-mode subscriber identity card, or one SIM card and one subscriber number for GSM technology read from a dual-mode subscriber identity card, respectively (step S 1317 ). If the type of the double communication mode is selected with only the CDMA module, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two R-UIM cards, two subscriber numbers for CDMA technology read from a dual-mode subscriber identity card, or an R-UIM card and one subscriber number for CDMA technology read from a dual-mode subscriber identity card, respectively (step S 1318 ). Otherwise, if the type of the double communication mode is selected with both the CDMA module and the GSM module, the CDMA module and the GSM module are activated or turned on and the functionalities of wireless transceiving therein are enabled with an R-UIM card and a SIM card, two subscriber numbers for CDMA and GSM read from a dual-mode subscriber identity card, one subscriber number for CDMA technology read from a dual-mode subscriber identity card and a SIM card, or an R-UIM card and one subscriber number for GSM technology read from a dual-mode subscriber identity card, respectively (step S 1319 ). 
         [0063]    Subsequent to step S 1312 , if the user selects a triple communication mode, the master further determines the type of the triple communication mode (step S 1320 ). If the type of the triple communication mode is selected with double GSM and single CDMA, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card or one subscriber number for CDMA technology read from a dual-mode subscriber identity card, while the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM card and one subscriber number for GSM technology read from a dual-mode subscriber identity card, or two subscriber numbers for GSM technology read from two dual-mode subscriber identity cards, respectively (step S 1321 ). If the type of the triple communication mode is selected with single GSM and double CDMA, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card and one subscriber number for CDMA technology read from a dual-mode subscriber identity card, or two subscriber numbers for CDMA technology read from two dual-mode subscriber identity cards, respectively, while the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with a SIM card or one subscriber number for GSM technology read from a dual-mode subscriber identity card (step S 1322 ). Subsequent to step S 1312 , if the user selects a quadruple communication mode, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two subscriber numbers for CDMA technology read from two dual-mode subscriber identity cards, respectively, while the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with two subscriber numbers for GSM technology read from two dual-mode subscriber identity cards, respectively (step S 1323 ). 
         [0064]    Subsequent to step S 1304 , if three subscriber identity cards are detected, the master continues to prompt the user to select the communication mode (step S 1324 ). Specifically, the user may select the communication mode according to any combination of the number and type of the detected subscriber identity cards, and the type of subscriber numbers. If the user selects a single communication mode, the flow of the method proceeds to step S 1313 . If the user selects a double communication mode, the flow of the method proceeds to step S 1316 . If the user selects a triple communication mode, the flow of the method proceeds to step S 1320 . If the user selects a quadruple communication mode, the flow of the method proceeds to step S 1323 . 
         [0065]    Note that, in this embodiment, the wireless communications device supports  5  and  6  standby mode, in addition to the  1  to  4  standby modes described above. Subsequent to step S 1324 , if the user selects a quintuple communication mode, the master further determines the type of the quintuple communication mode (step S 1325 ). If the type of the quintuple communication mode is selected with triple GSM and double CDMA, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with two subscriber numbers for CDMA technology read from two dual-mode subscriber identity cards, respectively, while the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with three subscriber numbers for GSM technology read from the three dual-mode subscriber identity cards, or a SIM card and two subscriber numbers for GSM technology read from two dual-mode subscriber identity cards, respectively (step S 1326 ). If the type of the quintuple communication mode is selected with double GSM and triple CDMA, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with an R-UIM card and two subscriber numbers for CDMA technology read from two dual-mode subscriber identity cards, or three subscriber numbers for CDMA technology read from the three dual-mode subscriber identity cards, respectively, while the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with two subscriber numbers for GSM technology read from two dual-mode subscriber identity cards, respectively (step S 1327 ). Subsequent to step S 1324 , if the user selects a sextuple communication mode, the CDMA module is activated or turned on and the functionality of wireless transceiving therein is enabled with three subscriber numbers for CDMA technology read from the three dual-mode subscriber identity cards, respectively, while the GSM module is activated or turned on and the functionality of wireless transceiving therein is enabled with three subscriber numbers for GSM technology read from the three dual-mode subscriber identity cards, respectively (step S 1328 ). 
         [0066]    Note that, the CDMA module and the GSM module may be integrated into a single combo communication module, such as the CDMA+GSM combo module  810 , which supports both the CDMA and GSM technologies, so the method as described in  FIG. 13  may also be applied for such a combo-communication-module design, and the invention is not limited thereto. In addition, for those skilled in the art, modifications may be contemplated to apply the method for coordinating the operations between two communication modules as described above in  FIGS. 10 to 13  in the architecture as shown in  FIG. 9 . 
         [0067]    While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited thereto. Those who are skilled in this technology can still make various alterations and modifications without departing from the scope and spirit of this invention. For example, the CDMA module, the GSM module, the GSM/UTRA module, or the GSM/UTRA/LTE module may be replaced with a communication module operating in compliance with a different wireless communication technology, such as the TD-SCDMA technology, the WiMAX technology, or others. Although the MS architectures in the embodiments described above comprise two or three card slots, the invention is not limited thereto. The embodiments may also be applied to other MS architectures with four or more card slots as long as the applied MS supports a septuple standby mode or more. Therefore, the scope of the present invention shall be defined and protected by the following claims and their equivalents.