Iphone 4 "Volume Control Cabel" and "Home Button Assembly" replacement
All the volume buttons, mute switch and home button went wrong after two years of proger usage.
I fixed both the iPhone 4 Headphone Jack & Volume Control Cable and Home Button Assembly by replacing both two parts. I also replaced the bottom screws for philips screws for easier future repairs or battery replacement.
Everything works fine! I can only advice to read everything in these guides and pay close attention to which screws goes to where! Do number them to know which goes where!
iPhone 4 (GSM/AT&T) Headphone Jack & Volume Control Cable
iPhone 4 Home Button Assembly