simple bro just bye one. . . .!!!!!
he he he just kidding
now your answer is
ofcourse u have a headphone (3.5 mm) of your phone, so use that
but it has only one cord, so when u need a head phone just plug in the green plug of ur pc (headphone), and plug it into red one when need a microphone (mike)
now the headphone of the phones are made with 2 speakers and with a small microphone