Patent ID: 7925294

Claim:
A mobile communication device comprising: a non-volatile display capable of displaying information without power; a power management unit; 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 non-volatile display and for signaling the power management unit to power off the non-volatile display after displaying the subset of the previous communication records of the communication history list on the non-volatile display, wherein the displayed previous communication records are listed in order according to associated frequencies of communication 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 a group consisting of a morning period, an afternoon period, and an evening period.