CN104683585B - A kind of mobile terminal and its intelligent call transfer method - Google Patents

Abstract

The present invention relates to the technical field of mobile terminals. The present invention provides a mobile terminal and its intelligent call transfer method. The intelligent call transfer method includes: reading and storing the card number information and telephone number information of the first subscriber identification card and the second subscriber identification card ; Detect the signal quality grades of the first subscriber identity card and the second subscriber identity card; judge whether the signal quality grade of the first subscriber identity card is higher than the signal quality grade of the second subscriber identity card, if yes, then according to the first subscriber identity card transfer the call settings of the second subscriber identity card to the first subscriber identity card; otherwise, transfer the call settings of the first subscriber identity card to the second subscriber identity card according to the telephone number information of the second subscriber identity card identification card. By detecting the signal quality level of the subscriber identification card, the call setting is transferred to the subscriber identification card with a high signal quality level, so as to ensure that the user can answer the call in the best signal quality state under any circumstances.

Description

A mobile terminal and its intelligent call transfer method

technical field

The invention relates to the technical field of mobile terminals, in particular to a mobile terminal and an intelligent call transfer method thereof.

Background technique

With the development and popularization of mobile devices, more and more mobile phones have adopted dual-card design. Usually, when an incoming call is made, the mobile phone number dialed by the caller decides to use the corresponding SIM card to answer the call. When our When the two SIM cards are in the standby state, due to the differences in the supported operators and standards, as well as the differences in the performance of mobile phone antennas that support the work of the two SIM cards, and the variability of mobile signals in the real network environment, often in the same environment Among them, there is a large difference in the signal quality received by the two cards. When using the SIM card with poor signal quality to answer the call, the poor signal quality leads to unclear answering, which affects the user experience. To sum up, In the prior art, when there is a big difference in signal quality received by the two SIM cards, using the SIM card with poor signal quality to answer the call leads to a problem of poor user experience.

Contents of the invention

The purpose of the present invention is to provide a mobile terminal and its intelligent call transfer method, aiming to solve the problem of using the SIM card with poor signal quality to answer calls when there is a large difference in the signal quality received by two SIM cards in the prior art. The problem of the phone causing a poor user experience.

The present invention is achieved in this way. In the first aspect, an intelligent call transfer method for a mobile terminal, the mobile terminal is provided with a first subscriber identification card and a second subscriber identification card. It is characterized in that the intelligent call transfer method Include the following steps:

A. Read and save the card number information and phone number information of the first subscriber identification card and the second subscriber identification card;

B. detecting the signal quality level of said first subscriber identity card and said second subscriber identity card;

C. Judging whether the signal quality level of the first subscriber identity card is the same as the signal quality level of the second subscriber identity card, if yes, then execute step D, if no, then execute step E;

D. maintaining call settings for said first subscriber identity card and said second subscriber identity card;

E. Judging whether the signal quality level of the first subscriber identity card is higher than the signal quality level of the second subscriber identity card, if yes, then perform step F, if not, then perform step G;

F. Transferring the call settings of the second subscriber identity card to the first subscriber identity card according to the telephone number information of the first subscriber identity card;

G. Transferring the call settings of the first subscriber identity card to the second subscriber identity card according to the telephone number information of the second subscriber identity card.

With reference to the first aspect, in the first possible implementation manner of the first aspect, the step B is specifically:

detecting the real-time signal strength of the first subscriber identity card and the second subscriber identity card;

determining the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength.

With reference to the first possible implementation of the first aspect, in a second possible implementation of the first aspect, in the step B, detecting the real-time ID of the first subscriber identification card and the second subscriber identification card The signal strength step also includes:

detecting the stability of the real-time signal strength of the first subscriber identity card and the second subscriber identity card within a predetermined time;

determining the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength and the stability of the real-time signal strength.

With reference to the second possible implementation of the first aspect, in a third possible implementation of the first aspect, in the step B, detecting the real-time ID of the first subscriber identification card and the second subscriber identification card Before the signal strength steps also include:

judging whether the first subscriber identity card and the second subscriber identity card belong to the same operator, and if yes, determine whether the first subscriber identity card and the second subscriber identity card belong to the same operator according to the signal quality level standard corresponding to the same operator The signal quality level of the subscriber identity card; if not, determine the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the signal quality level standards corresponding to each operator.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, before the step of reading and saving the card number information and phone number information of the first subscriber identity card and the second subscriber identity card, there is an include:

When receiving a control instruction from the user for enabling the automatic call forwarding function, the automatic call forwarding function is started.

The second aspect of the present invention also provides a mobile terminal, the mobile terminal is provided with a first subscriber identification card and a second subscriber identification card, characterized in that the mobile terminal includes:

An information reading module, configured to read and store the card number information and phone number information of the first subscriber identification card and the second subscriber identification card;

a signal quality detection module, configured to detect the signal quality levels of the first subscriber identity card and the second subscriber identity card;

A first judging module, configured to judge whether the signal quality level of the first subscriber identity card is the same as the signal quality level of the second subscriber identity card;

A call transfer module, configured to maintain the call settings of the first subscriber identity card and the second subscriber identity card when the judgment result of the first judgment module is yes;

A second judging module, configured to judge whether the signal quality level of the first subscriber identity card is higher than the signal quality level of the second subscriber identity card when the judging result of the first judging module is negative;

The call transfer module is further configured to transfer the call setting of the second subscriber identity card to the call setting of the second subscriber identity card according to the telephone number information of the first subscriber identity card when the judgment result of the second judgment module is yes. a first user identification card;

The call transfer module is further configured to transfer the call settings of the first subscriber identity card to the second subscriber identity card according to the telephone number information of the second subscriber identity card when the judgment result of the second judgment module is no. A second subscriber identification card.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the process of the signal quality detection module detecting the signal quality levels of the first subscriber identity card and the second subscriber identity card includes:

detecting the real-time signal strength of the first subscriber identity card and the second subscriber identity card;

determining the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the signal quality detection module detects The process of signal quality rating also includes:

detecting the stability of the real-time signal strength of the first subscriber identity card and the second subscriber identity card within a predetermined time;

determining the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength and the stability of the real-time signal strength.

With reference to the second possible implementation of the second aspect, in a third possible implementation of the second aspect, the mobile terminal further includes a third judging module;

The third judging module is used to judge whether the first subscriber identity card and the second subscriber identity card belong to the same operator;

When the determination result of the third determination module is yes, the signal quality detection module determines the signal quality of the first subscriber identity card and the second subscriber identity card according to the signal quality level standard corresponding to the same operator grade;

When the judgment result of the third judging module is negative, the signal quality detection module respectively standardizes the signals of the first subscriber identity card and the second subscriber identity card according to the signal quality grade corresponding to each operator. quality level.

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, the mobile terminal further includes a call transfer initiation module;

The call forwarding starting module is used for starting the automatic call forwarding function according to user instructions.

The invention provides a mobile terminal and its intelligent call transfer method. By detecting the signal quality level of the subscriber identification card, the call setting is transferred to the subscriber identification card with a high signal quality level, and the preset function is realized only by software method. The method is simple, will not affect the system, and can ensure that the user can answer the call in the best signal quality state under any circumstances; in addition, it can not only obtain the best call experience, but also save the power consumption of the radio frequency system of the mobile phone and realize battery The ultra-long standby time further enhances the user experience.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following descriptions are only of the present invention. For some embodiments, those skilled in the art can also obtain other drawings according to these drawings without paying creative efforts.

FIG. 1 is a flow chart of an intelligent call transfer method for a mobile terminal provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a mobile terminal provided by another embodiment of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

An embodiment of the present invention provides an intelligent call transfer method for a mobile terminal. The mobile terminal is provided with a first subscriber identification card and a second subscriber identification card. The intelligent call transfer method includes the following steps:

Step S101. Read and save the card number information and phone number information of the first subscriber identification card and the second subscriber identification card.

Specifically, in this step, two subscriber identification cards (SIM card 1 and SIM card 2) are provided in the mobile terminal, and the card number information of the two subscriber identification cards and the phone number information corresponding to each card number are read first.

Step S102. Detect signal quality levels of the first subscriber identity card and the second subscriber identity card.

Specifically, in this step, an implementation manner of the step of detecting the signal quality level is:

Step S1021. Detect the real-time signal strength of the first subscriber identity card and the second subscriber identity card.

Specifically, in this step, the signal strength information can be obtained by acquiring network status and base station information, and the signal strength information can be represented by the format of the antenna signal strength displayed on the interface of the mobile terminal.

Step S1022. Determine the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength.

Specifically, in this step, the stronger the real-time signal strength is, the higher the corresponding signal quality level is.

Further, another implementation manner of the step of detecting the signal quality level is:

After step S1021, it also includes:

Step S1023. Detect the stability of the real-time signal strength of the first subscriber identity card and the second subscriber identity card within a predetermined time.

Specifically, in this step, for example, within a predetermined time of 30 seconds, the stability of the signal strength is detected, that is, the change of the signal strength is detected, including the number of changes and the range of the signal strength change.

Step S1024. Determine the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength and the stability of the real-time signal strength.

Specifically, in this step, it is judged whether the signal strengths of the first subscriber identity card and the second subscriber identity card are the same, or whether the difference between the signal strengths of the first subscriber identity card and the second subscriber identity card is within a preset difference Within the range, when the signal strengths are different or the difference between the signal strengths is not within the preset difference range, the signal quality level is determined based on the signal strength; when the signal strengths are the same or the difference between the signal strengths is within the preset difference range, then Determine the signal quality level according to the stability of the real-time signal strength. When the signal strength changes too frequently, for example, the number of changes within a predetermined time is large, or the range of change is large. At this time, the stability of the determined signal strength is poor , correspondingly, it can be determined that the signal quality level is low.

Further, another implementation manner of the step of detecting the signal quality level is:

Before step S1021, it also includes:

Step S1025. Determine whether the first subscriber identity card and the second subscriber identity card belong to the same operator, if yes, execute step S1026; if no, execute step S1027.

Specifically, in this step, the subscriber identity cards in the mobile terminal may belong to different operators, such as any two of China Mobile, China Telecom or China Unicom.

Step S1026. Determine the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the signal quality level standards corresponding to the same operator.

Step S1027. Standardize the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the signal quality levels corresponding to each operator.

Specifically, in this step, since the real-time signal strength and the stability of the real-time signal strength of different operators are not the same, it is necessary to define the signal quality level standard to calculate the signal quality level, for example, using the user identification of China Mobile The signal strength of the card is generally better than the signal strength of the subscriber identification card of China Telecom. Under the same signal strength, the signal level corresponding to the real-time signal strength of the subscriber identification card of China Mobile is slightly higher than that of the subscriber identification card of China Telecom. This difference is embodied as setting an error level, and when calculating the subscriber identity card of a certain operator, a set error level is added for calculation and comparison.

Step S103. Determine whether the signal quality level of the first subscriber identity card is the same as that of the second subscriber identity card, if yes, execute step S104; if no, execute step S105.

Step S104. Maintain the call settings of the first subscriber identity card and the second subscriber identity card.

Specifically, in this step, when the signal quality level of the first subscriber identity card is equal to the signal quality level of the second subscriber identity card, the two cards do not transfer calls to each other

Step S105. Determine whether the signal quality level of the first subscriber identity card is higher than the signal quality level of the second subscriber identity card, if yes, execute step S106; otherwise, execute step S107.

Step S106. According to the telephone number information of the first subscriber identity card, the call setting of the second subscriber identity card is transferred to the first subscriber identity card.

Step S107. Transfer the call settings of the first subscriber identity card to the second subscriber identity card according to the telephone number information of the second subscriber identity card.

Steps S105 to S107 ensure that the user can answer the call with the best signal quality under any circumstances, so that the user can obtain the best call experience.

Before the step of reading and saving the card number information and phone number information of the first subscriber identification card and the second subscriber identification card, it also includes:

When receiving a control instruction from the user for enabling the automatic call forwarding function, the automatic call forwarding function is started.

Another embodiment of the present invention also provides a mobile terminal, the mobile terminal is provided with a first subscriber identification card and a second subscriber identification card, and the mobile terminal includes:

The information reading module 201 is used to read and save the card number information and telephone number information of the first subscriber identification card and the second subscriber identification card;

A signal quality detection module 202, configured to detect the signal quality levels of the first subscriber identity card and the second subscriber identity card;

The first judging module 203 is used to judge whether the signal quality level of the first subscriber identity card is the same as the signal quality level of the second subscriber identity card;

The call transfer module 205 is used to keep the call settings of the first subscriber identity card and the second subscriber identity card when the judgment result of the first judgment module 203 is yes;

The second judging module 204 is configured to judge whether the signal quality level of the first subscriber identity card is higher than the signal quality level of the second subscriber identity card when the judging result of the first judging module 203 is no;

The call transfer module 205 is also used to transfer the call setting of the second subscriber identity card to the first subscriber identity card according to the telephone number information of the first subscriber identity card when the judgment result of the second judgment module 204 is yes;

The call forwarding module 205 is further configured to transfer the call setting of the first subscriber identity card to the second subscriber identity card according to the telephone number information of the second subscriber identity card when the judgment result of the second judgment module 204 is negative.

Further, the process of the signal quality detection module 202 detecting the signal quality levels of the first subscriber identity card and the second subscriber identity card includes:

Detecting the real-time signal strength of the first subscriber identity card and the second subscriber identity card;

The signal quality levels of the first subscriber identity card and the second subscriber identity card are determined according to the real-time signal strength.

Specifically, the signal strength information can be obtained by acquiring network status and base station information, and the signal strength information can be expressed in the format of the antenna signal strength displayed on the interface of the mobile terminal.

Further, the process of the signal quality detection module 202 detecting the signal quality levels of the first subscriber identity card and the second subscriber identity card further includes:

Detecting the changing frequency of the real-time signal strength of the first subscriber identity card and the second subscriber identity card within a predetermined time;

The signal quality levels of the first subscriber identity card and the second subscriber identity card are determined according to the real-time signal strength and the change frequency of the real-time signal strength.

Specifically, it is judged whether the signal strengths of the first subscriber identity card and the second subscriber identity card are the same, or whether the difference between the signal strengths of the first subscriber identity card and the second subscriber identity card is within a preset difference range, when the signal If the strengths are different or the difference between signal strengths is not within the preset difference range, the signal quality level is determined based on the signal strength; when the signal strengths are the same or the difference between signal strengths is within the preset difference range, the real-time The stability determines the signal quality level. When the signal strength changes too frequently, for example, the number of changes within a predetermined time is large, or the range of change is large. At this time, the stability of the determined signal strength is poor, and the corresponding can be determined The signal quality level is low.

Further, the mobile terminal also includes a third judging module;

The third judging module is used to judge whether the first subscriber identity card and the second subscriber identity card belong to the same operator;

When the determination result of the third determination module is yes, the signal quality detection module 202 determines the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the signal quality level standard corresponding to the same operator;

When the determination result of the third determination module is negative, the signal quality detection module 202 standardizes the signal quality levels of the first subscriber identity card and the second subscriber identity card respectively according to the signal quality level corresponding to each operator.

Specifically, since the real-time signal strength and the stability of the real-time signal strength of different operators are different, it is necessary to customize the signal quality level standard to calculate the signal quality level. The signal strength of China Telecom's subscriber identification card is good. Under the same signal strength, the signal level corresponding to the real-time signal strength of China Mobile's subscriber identification card is slightly higher than that of China Telecom's subscriber identification card. This difference can be reflected as Set an error level, and add a set error level when calculating the SIM card of a certain operator for calculation and comparison.

The mobile terminal also includes a call transfer starting module;

The call transfer starting module is used for starting the automatic call transfer function according to user instructions.

The invention provides a mobile terminal and its intelligent call transfer method. By detecting the signal quality level of the subscriber identification card, the call setting is transferred to the subscriber identification card with a high signal quality level, and the preset function is realized only by software method. The method is simple, will not affect the system, and can ensure that the user can answer the call in the best signal quality state under any circumstances; in addition, it can not only obtain the best call experience, but also save the power consumption of the radio frequency system of the mobile phone and realize battery The ultra-long standby time further enhances the user experience.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, and other media that can store program codes. .

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, several equivalent substitutions or obvious modifications are made without departing from the concept of the present invention, and the performance or use is the same, all should be regarded as belonging to the present invention by the submitted claims The scope of patent protection determined by the book.

Claims (4)

1. an intelligent call transfer method for a mobile terminal, wherein the mobile terminal is provided with a first subscriber identification card and a second subscriber identification card, it is characterized in that the intelligent call transfer method comprises the following steps: A. read and save the card number information and phone number information of the first subscriber identification card and the second subscriber identification card; B. Detect the signal quality level of the first subscriber identity card and the second subscriber identity card; calculate the signal quality level by customizing the signal quality level standard; C. judging whether the signal quality level of the first subscriber identity card is the same as the signal quality level of the second subscriber identity card, if yes, then execute step D, if no, then execute step E; D. maintaining the call settings of the first subscriber identity card and the second subscriber identity card; E. judging whether the signal quality level of the first subscriber identity card is higher than the signal quality level of the second subscriber identity card, if yes, then perform step F, if not, then perform step G; F. according to the telephone number information of the first subscriber identity card, transfer the call setting of the second subscriber identity card to the first subscriber identity card; G. Transferring the call settings of the first subscriber identity card to the second subscriber identity card according to the telephone number information of the second subscriber identity card; Described step B is specifically: judging whether the first subscriber identity card and the second subscriber identity card belong to the same operator, and if yes, determine whether the first subscriber identity card and the second subscriber identity card belong to the same operator according to the signal quality level standard corresponding to the same operator The signal quality level of the subscriber identification card; if not, then determine the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the signal quality level standards corresponding to each operator; detecting the real-time signal strength of the first subscriber identity card and the second subscriber identity card; determining the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength; the stronger the real-time signal strength, the higher the corresponding signal quality level; The step of detecting the real-time signal strength of the first subscriber identity card and the second subscriber identity card in the step B also includes: Detecting the stability of the real-time signal strength of the first subscriber identity card and the second subscriber identity card within a predetermined period of time; the signal strength stability parameters include: the number of times signal strength changes and the range of signal strength changes; determining the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength and the stability of the real-time signal strength; The determining the signal quality level of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength and the stability of the real-time signal strength is specifically: judging whether the signal strengths of the first subscriber identity card and the second subscriber identity card are the same, or judging whether the difference between the signal strengths of the first subscriber identity card and the second subscriber identity card is within a preset difference range; When the signal strengths are different or the difference between the signal strengths is not within the preset difference range, the signal quality level is determined based on the signal strength; When the signal strengths are the same or the difference between the signal strengths is within a preset difference range, the signal quality level is determined according to the stability of the real-time signal strength. 2. The method according to claim 1, characterized in that, before the step of reading and saving the card number information and the telephone number information of the first subscriber identification card and the second subscriber identification card, it also includes: When receiving a control instruction from the user for enabling the automatic call forwarding function, the automatic call forwarding function is started. 3. A kind of mobile terminal, described mobile terminal is provided with first subscriber identification card and second subscriber identification card, it is characterized in that, described mobile terminal comprises: An information reading module, configured to read and store the card number information and phone number information of the first subscriber identification card and the second subscriber identification card; A signal quality detection module, configured to detect the signal quality level of the first subscriber identity card and the second subscriber identity card; calculate the signal quality level by customizing the signal quality level standard; A first judging module, configured to judge whether the signal quality level of the first subscriber identity card is the same as the signal quality level of the second subscriber identity card; A call transfer module, configured to maintain the call settings of the first subscriber identity card and the second subscriber identity card when the judgment result of the first judgment module is yes; A second judging module, configured to judge whether the signal quality level of the first subscriber identity card is higher than the signal quality level of the second subscriber identity card when the judging result of the first judging module is negative; The call transfer module is further configured to transfer the call setting of the second subscriber identity card to the call setting of the second subscriber identity card according to the telephone number information of the first subscriber identity card when the judgment result of the second judgment module is yes. a first user identification card; The call transfer module is further configured to transfer the call settings of the first subscriber identity card to the second subscriber identity card according to the telephone number information of the second subscriber identity card when the judgment result of the second judgment module is no. a second user identification card; The process of detecting the signal quality levels of the first subscriber identity card and the second subscriber identity card by the signal quality detection module includes: The mobile terminal also includes a third judging module; The third judging module is used to judge whether the first subscriber identity card and the second subscriber identity card belong to the same operator; When the determination result of the third determination module is yes, the signal quality detection module determines the signal quality of the first subscriber identity card and the second subscriber identity card according to the signal quality level standard corresponding to the same operator grade; When the judgment result of the third judging module is negative, the signal quality detection module respectively standardizes the signals of the first subscriber identity card and the second subscriber identity card according to the signal quality grade corresponding to each operator. quality level; detecting the real-time signal strength of the first subscriber identity card and the second subscriber identity card; determining the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength; the stronger the real-time signal strength, the higher the corresponding signal quality level; The process of detecting the signal quality levels of the first subscriber identity card and the second subscriber identity card by the signal quality detection module further includes: Detecting the stability of the real-time signal strength of the first subscriber identity card and the second subscriber identity card within a predetermined period of time; the signal strength stability parameters include: the number of times signal strength changes and the range of signal strength changes; determining the signal quality levels of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength and the stability of the real-time signal strength; The determining the signal quality level of the first subscriber identity card and the second subscriber identity card according to the real-time signal strength and the stability of the real-time signal strength is specifically: judging whether the signal strengths of the first subscriber identity card and the second subscriber identity card are the same, or judging whether the difference between the signal strengths of the first subscriber identity card and the second subscriber identity card is within a preset difference range, When the signal strengths are different or the difference between the signal strengths is not within the preset difference range, the signal quality level is determined based on the signal strength; When the signal strengths are the same or the difference between the signal strengths is within a preset difference range, the signal quality level is determined according to the stability of the real-time signal strength. 4. The mobile terminal according to claim 3, characterized in that, the mobile terminal also includes a call transfer activation module; The call forwarding starting module is used for starting the automatic call forwarding function when receiving a control instruction from the user to enable the automatic call forwarding function.