okay, try to see clearly by using torch light whether any small debris stuck inside or not..otherwise the method u insert the headphone jack might be not fully in....as far i get to know that ori headphone jack had 3 signal stripe on the shaft( i notice that)..while another type(which is common one) had only 2 stripe ..by pushing in further you able to her the rest of the sounds...try it out and let us know!!!!