Here's a repair guide on how to fix the iphone 4 dock connector.
You can use this guide to replace the dock connector assembly, which is includes the dock connector and lower microphone.
Tools Needed
* Paper Clip
* Phillips #00 Screwdriver
* Small Flathead Screwdriver
* Spudger
* Tweezers
* iPod Opening Tools
iPhone 4 Dock Connector Repair manual
iPhone 4 Dock Connector Repair manual
9:56 AM
Katherine