Default [Q] mic headset problem

Hello xda, i had an ICS stock and all worked perfectly untill one day the mic of the headset stopped working, and the controller too. I thought it was a OS problem, so i tried to install Kitkat from CM snapshot, the 10.3 and allso 10 different MIUIv5 versions, still doesent work(with the 3 wipes). The headset works perfectly in other devices. What can i do? i have a SGS2 and currently im on MIUIv5 3.5.31 Spanish version.

Thank you for your time