Mobile communication device and communication method thereof

A mobile communication device for performing different applications corresponding to different function and replaceable back covers, the mobile communication device comprises:

• a body comprising a battery and a first connection interface applied above the battery;
• one of the different function and replaceable back covers having a configuration corresponding to shape of the body to engage with the body and cover the battery of the body to avoid an exposure of the battery, the at least one replaceable back cover comprising a second connection interface corresponding to and connecting with the first connection interface and an integrated circuit (IC) element having identification information;
• wherein the first and second connection interfaces are configured to transmit different identification information of the different function back covers, a cavity is defined when the body and the one of the different function and replaceable back covers are engaged, the battery and the first and second connection interfaces are inside the cavity;
• a storage unit for storing the application and a mapping table, the mapping table recording the different identification information and corresponding applications;
• and
• a processing unit electrically connected to the first and second connection interfaces and the storage unit, when the one of the different function and replaceable back covers is assembled to the body, the processing unit receiving the identification information by the first and second connection interfaces, the processing unit looking up the mapping table according to the identification information, and the processing unit enabling the application according to the mapping table.

A communication method for a mobile communication device performing different applications corresponding to different function and replaceable back covers, wherein the mobile communication device comprise a body, the different function and replaceable back covers have different integrated circuit (IC) elements having different identification information, the method comprising:

• selecting one back cover from the different function and replaceable back covers, the back cover having a first IC element and a first connection interface, the first IC element having identification information;
• assembling the back cover to the body of the communication device, the body having a processing unit, a storage unit, and a second connection interface, the processing unit being electrically connected to the storage unit and the second connection interface, the storage unit storing at least an application and a mapping table, the mapping table being configured to record different identification information and corresponding applications;
• transmitting the identification information between the first connection interface and the second connection interface connected to the first connection interface;
• receiving the identification information by the processing unit;
• looking up the mapping table according to the identification information using the processing unit, for obtaining the application according to the back cover;
• and
• performing the obtained application by the processing unit.