USB Connector is defective?
You'll need a new connector if your iPhone 4 won't charge, isn't recognized by your computer,
the headphone jack has a loose connection, or your headset remote doesn't work.
Even if you can't be heard on the phone because the microphone is defective, the part needs to be replaced.
Primary Speech MicrophoneAntenna CableFitted
in white for iPhone 4Technical
Integrietes Speech MicrophoneCompatibility
iPhone 4 (A1332, A1349)
4 USB Connector White