My fix was much more low tech...my iPhone apparently had acquired a righteous among of belly button lint in the screen for the mic. I used an old dry toothbrush and gently cleaned out the area and it looks and more importantly, works like new. Sometimes you gotta go low tech first...
Anyway, here the picture showing the location. Basically the standoff is a screw that holds the board to the frame and has a head with an opening to screw into, in this case the cover over all the ribbon connectors has a screw holding it down received by the standoff.
http://cl.ly/3g1Z401o0M3G3l2o3a3V