Apparatus, system, and method for mobile communication

A mobile communication system comprising:

• a first communication network connected with a first mobile communication apparatus and a second mobile communication apparatus respectively, for allowing communication between the first mobile communication apparatus and the second mobile communication apparatus;
• a second communication network connected with the first mobile communication apparatus and the second mobile communication apparatus respectively, for allowing communication between the first mobile communication apparatus and the second mobile communication apparatus;
• and
• a control center connected to the first communication network and the second communication network respectively;
• wherein when the first mobile communication apparatus and the second mobile communication apparatus communicate with each other through the first communication network, the first mobile communication apparatus compares signal quality of the first communication network with signal quality of the second communication network and sends, according to a criterion, a switch phone number to the second mobile communication apparatus, and communicates with the second mobile communication apparatus through the second communication network by dialing the switch phone number;
• wherein when the first mobile communication apparatus and the second mobile communication apparatus communicate with each other through the first communication network, the first mobile communication apparatus compares signal quality of the first communication network with signal quality of the second communication network and sends, according to the criterion, a switch request to the control center, the control center connects the first mobile communication apparatus to the second communication network after receiving the switch request, and switches the communication between the first mobile communication apparatus and the second mobile communication apparatus to the second communication network.

A mobile communication method, for allowing a mobile communication apparatus to communicate with a callee or a caller through a first communication network, the mobile communication method comprising the following steps:

• (a) connecting the first communication network and a second communication network;
• and
• (b) comparing signal quality of the first communication network and signal quality of the second communication network;
• wherein when the mobile communication apparatus communicates with the callee through the first communication network, the mobile communication method further comprises the following steps:
• (c1) the mobile communication apparatus sending, according to a criterion, a switch phone number to the callee;
• and (c2) the mobile communication apparatus communicating with the callee through the second communication network by dialing the switch phone number;
• wherein when the mobile communication apparatus communicates with the caller through the first communication network, the mobile communication method further comprises the following steps:
• (d1) the mobile communication apparatus sending, according to the criterion, a switch request to a control center;
• (d2) the control center connecting the mobile communication apparatus to the second communication network after receiving the switch request;
• and (d3) the control center switching the communication between the mobile communication apparatus and the caller to the second communication network.