BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows an overview of a communication system in an embodiment of the present invention.
FIG. 2A and FIG. 2B are perspective views showing an external view of a mobile phone in an embodiment of the present invention.
FIG. 3 is a functional block diagram showing an exemplary function of the mobile phone in the present embodiment.
FIG. 4 is a flowchart illustrating an exemplary flow of a process during communication.