Microphone on phone calls was not working. I could hear other party, but they cold not hear me!
The guidelines on ifixit and illustrations made it very easy! I changed the charging dock with flex cable in under 2 hours. This $30.00 saved me lots of money as it wold have been $150.00 to swapp out my out of warranty I Phoenix 4.
Be patient and take your time this job is not for people who can't sit down and be still. The worst part is removing the rubber peace from the old microphone . Rember don't rus it. Take your time and it will work.
Phillips #00 Screwdriver
Flathead 3/32" or 2.5 mm Screwdriver
P2 Pentalobe Screwdriver iPhone
iPhone 4 (GSM/AT&T) Headphone Jack & Volume Control Cable