iPhone 4S Speaker replacement
Speaker did not work. All software and firmware fix attempts did not solve the problem
Repair went well though Apples use of adhesives makes things occasionally a little dicey. The Philips heads for the screw driver in the ifixit pro kit are fairly poor quality with the flanges thicker than they ought to be. other jewelers screw drivers work better.
When removing wireless antenna from speaker module work slowly to loosen adhesive. Be patient