first of all you have to know that this could Void your phone Warranty. I don't know, I couldn't stand it so I've fixed it anyways lol.
note:- the last and most important part is not shown very clearly in the video because my camera's focus can't be adjusted so I can shoot the small parts I'm working on , so I'll try my best explaining it in words (please note that English is not my first language,Arabic is so bear with me here =P). After removing the earpiece as it's shown on the video , you will need to gently using a pretty thin tweezer or screwdriver to pull up (the two metal parts shown at the last pictures in the Video) pull them just a little bit till' you see that there is a gap between them and the Earpiece( The Picture I've taken is after fixing the earpiece .so That is how the piece should look like after fixing it = ) its important that you do it gently because you might end up breaking it. Now you are done all you need to do is to put back the Earpiece back to its place ( the letters and numbers at the buttom of the earpiece should be facing upside down just like the letters and numbers that are printed on where the earpiece will be attached (earpiece slot? I dunno) Goodluck and if you are having second thaughts you might as well take it to your local Nokia Care Center. By the way this is my first Tutorial Video lol *that explains it =P