Patent ID: 7577452

Claim:
A cell phone comprising: a first antenna that receives radio waves from a base station; a second antenna that receives radio waves from the base station; a receiving circuit that acquires receiving levels of channels via the antennas; a switch circuit that switches the antennas; and a controller for selecting the channel that has the highest receiving level and that controls switching the antennas before selecting one of the antennas, wherein, when synchronization with the base station is not provided, the controller alternately switches the antennas a predetermined number of times during a predetermined fixed time that is calculated by the controller based on a total number of perch channels and a perch channel detection time, such that the switching is not in synchronization with any channel received from the base station, and wherein the controller alternately switches between the antennas with a predetermined timing in synchronization with the selected channel when synchronization with the base station is provided.