Redmi 1s Problem with headphones

May 28, 2014
I have a Redmi 1s, just arrived, but headphones with mic are not detected when i plug them in for the first time. The second time they get detected, but sound is really bad. I tried with 3 headphones from previous smartphones (ZOPO, THL and Sony) and i got same results.
The strangest thing is that if i push (and keep pushing) the action button of the headphones (the three of them have one) the sound works fine.
Did anyone tried with different headphones with mic?
Thanks in advance.