serial data transfer from mobile to pc

i want to send data serially from my mobile to pc.in my project ,i am required to do the following:
if i press a button ex button named 1,then that data ex 1 should be transfered to the serial port of the desktop so that i can read it from serial port of my computer

my email address:abhinav.dube@yahoo.com

from:
abhinav dube
iit delhi,new delhi