Currently Being ModeratedApr 30, 2011 2:29 PM (in response to louis a.)
Are you on the latest firmware?
When was the last time you restarted your iPhone?
If this doesn't do anything, try restoring it. If still nothing, then go to the Apple store.
Currently Being ModeratedMar 5, 2012 1:54 AM (in response to louis a.)
Its sounds like a problem I had which is a physical fault
1/ take to apple store for fix (may be expensive if your out of warranty)
2/ buy a new homebutton switch and fit yourself (very difficult to do yourself)
3./ take a look at this article (I tried this 1 month ago and everything works perfect) http://applecor.info/how-to/a-z/85-iphone-4s-non-responsive-home-button.html
4/This one is just a work around but still cool to know http://applecor.info/how-to/a-z/95-assistive-touch-buttons-iphone-gesture.html