How to replace the vibrator assembly in an iPhone 4S  How to
replace the vibrator assembly in an iPhone 4S  If you've got an
iPhone 4S that's out of warranty and the vibration function has
stopped working or is very faint, odds are you need a new
vibrator assembly. A DIY repair isn't too terribly difficult and
will cost you far less than a new iPhone.  Follow along and
we'll help you replace the vibrator assembly and keep your
iPhone 4S going strong for even longer.    What you'll need to
DIY replace an iPhone 4S vibrator assembly   Video walkthrough
While the video walkthrough is pretty detailed, we still
recommend using it in correlation with the written steps below.
The video above is a complete teardown and you don't need to
complete all the steps in order to replace the vibrator
assembly.  Power off your iPhone 4S  iPhone 4S slide to power
off   Remove the back plate    2. iPhone 4S dock connector
screws   5. iPhone 4S remove back plate   7. iPhone 4S back
removal  Remove the battery and grounding clip