Mobile communication device

A mobile communication device comprising:

• a non-volatile display capable of displaying information without power;
• a storage unit comprising a temporary storage section for storing a communication history list, which records previous communication records and frequencies of communication of each of the previous communication records;
• a processing unit, configured for displaying a subset of the previous communication records of the communication history list obtained from the temporary storage section on the display in response to a particular state of the mobile communication device, wherein the particular state is selected from a group consisting of a state when the mobile communication device enters a stand-by state and a state when the mobile communication device goes out of the stand-by state, and the displayed previous communication records are listed in order according to associated frequencies of communication of each of the previous communication records;
• and
• a plurality of keys, each of which corresponds to one of the displayed previous communication records, and when actuated, signals the mobile communication device to contact the one of the previous communication records correspondingly;
• wherein the processing unit further sorts the previous communication records of the communication history list during a time period according to associated frequencies of communication to obtain a period communicated list corresponding to the time period, the time period being selected from the group consisting of a morning period, an afternoon period, and an evening period.