7610 problem

was working fine a few days ago now when i make a call i cant hear it dialing + i cant hear who im speaking too and they cant hear me. i can hear the ringtone when someone rings me and it still plays the message tone so it cant be a speak problem?

it seems to be displaying an icon in the top right corner of the screen a headset so i tried plugging my head phone in and this worked as i can now hear who im speaking too. the thing is i cant get rid of the icon! its not possible too turn the enhancements off you can only change them to text phone or loopset but these still give me the same problems

any know whats wrong ?