Disclosed is a mobile phone for selectively performing transmission/receipt diversity when radio frequency signals are transmitted and received. The mobile phone includes control means for controlling transmission/receipt of the radio frequency signal and controlling transmission/receipt diversity; receipt adjusting means for controlling receipt of the radio frequency signal and controlling receipt diversity under control of the control means; first radio frequency signal receiving means for converting the radio frequency signal received through the first antenna into a baseband signal to be transmitted to the control means under receipt control of the receipt adjusting means; second radio frequency signal receiving means for converting the radio frequency signal received through the second antenna into a baseband signal to be transmitted to the control means under receipt diversity control of the receipt adjusting means; transmission diversity adjusting means for controlling transmission diversity under control of the control means; and radio frequency signal transmitting means for converting the baseband signal transmitted from the control means into a radio frequency signal to be transmitted to the first antenna and transmitting the radio frequency signal to the second antenna under transmission diversity control of the transmission diversity adjusting means.