10 - 30 minutos
Headphones and the bottom speaker would not work half the time.
Earpiece speaker was buzzy.
Everything went well, would have gone better if I had sorted the screws as I took them out, not easy to tell the difference between a 1.2 and a 1.3 millimeter screw.
I lost two of the screws and had to file down the two screws that came with the battery as replacements.
Put the screws on a labeled piece of tape as you remove them.
iPhone 4S Replacement Battery
iPhone 4S Headphone Jack & Volume Control Cable
iPhone 4S Earpiece Speaker
Mako Driver Kit - 64 Precision Bits