A mobile communication device is provided. The method includes: receiving a mail sending request which carries a mail template filled out by a sender; encapsulating the mail template into an anonymous mail that includes no receiver mailbox ID and no sender mailbox ID; and obtaining a receiver mailbox ID and delivering the encapsulated anonymous mail to a mailbox corresponding to the obtained receiver mailbox ID. An agitator having a first end portion and a second end portion is rotatably supported within the chamber of the nozzle body, and the agitator is removably coupled to the nozzle body. New images are created by applying a predetermined image processing to the selected original image for creation, until the minimum number N of shortfall images is satisfied. The client’s role is practically limited to displaying the received screens and sending out keystrokes and cursor-moving device inputs. The pull-down drive control signal swings between a high voltage level and the ground voltage level.