Patent ID: 8442594

Claim:
A communication device, comprising: a receiving unit for receiving an incoming call request from a caller, and generating a call signal when the communication device is called; a number obtaining unit for obtaining the phone number of the caller from the incoming call request, and generating a searching signal in response to the call signal; a searching unit for determining whether the phone number of the caller is listed in a phonebook of the communication device in response to the searching signal, and generating a timing signal when it is determined that the phone number of the caller is not listed in the phonebook; a timing unit for computing a request duration of the incoming call from the caller in response to the timing signal; a comparing unit for determining whether the request duration reaches a predetermined value, and generating a reminder signal when it is determined that the request duration reaches the predetermined value, the comparing unit further used for generating a determining signal when it is determined that the request duration does not reach the predetermined value; a reminder unit comprising a reminder state, and a non-reminder state which is default, the reminder unit generating a prompt to remind a callee to accept the incoming call when in the reminder state, and not generating a prompt for the incoming call when in the non-reminder state; the reminder unit being used for changing into the reminder state from the non-reminder state in response to the reminder signal; a determining unit for determining whether the incoming call request from the caller is stopped in response to the determining signal and generating a clear signal when it is determined that the incoming call request from the caller is stopped; and a clearing unit for clearing the obtained phone number of the caller in response to the clear signal.