Mi iPhone has got a problem! Nobody can hear me, they hear a lot of noise when calling. I tried a recorder and heared it myself. Like a constant swoooooshhhhhh and my voice very very weak.

Using headphones or bluetooth headsets works fine, but it's a pain to carry the headphones always or untangle them from my bag everytime they call me and I'm not uysing iPod function

My iPod is a 4GB and 1.1.1 firmware. Any help much appreciated.