Problem With Microphone, no one can hear me

'''I have a problem With my iphone! I think the microphone its broken cause nobody can hear me. I tried with another iPhone to change the dock piece connector but it didn't work.

I would like a photo of the microphone piece to have a look and see whats happening!

I allready know that the microphone is in the dock conector but U dont know in which part it is.

Please somebody can give some pictures of it.

And any solutions?

Thanks..

Greets From Isla de Margarita/Venezuela'''