iPhone 4 speaker went out... apparently they have a tendency to do this.
The steps were right on the money. I followed it along, taking my time, but ultimately it went well and it was fixed.
I'm near sighted and felt like I needed a digital microscope to see half of the screws. DO NOT MISPLACE THEM!
One of the first couple steps talks about taking off the battery. Okay --- Yes you have to be ginger with that thing, but whatever super-duper concrete style adhesive they use to secure the battery in the case takes a lot of pressure to get out.
The picture says "Then pull the tab by the phone to remove the battery". Well that S.O.B 'pull me' tab broke about half pull. Again, the adhesive on the battery.... Just get it out... take your time but get it out. It'll require some strength.
-Magnetic tipped bits --- DO NOT misplace the screws.
-Find a way to make your fingers lose weight -- Big hands and fat fingers are not a friend here
-Take your time -- Be patient with this.
-Get out the battery, though it really secured on there
-Approximate length of repair time: between 45min-90min depending on how experienced you are.
-- When all else fails, drop test it, then hit it a hammer, run it over with your truck ... then rinse and repeat.