40 minutos - 2 horas
My phone was out of warranty and the speaker didn't work anymore when I talked on the phone. It was probably water damage.
The repair was easier than I expected and successful. It took about 30 minutes.
Follow the steps, be organized, look out for catching loose wires and connectors when you replace components.
Phillips #00 Screwdriver
Flathead 3/32" or 2.5 mm Screwdriver
iPhone 4 Earpiece Speaker