iOS 6 update on 4s - sound issues - reinstall iOS?

[StingMe]

So if iOS6 won't behave on this 4s and Apple provides no way of going back to iOS5, what will they do if she has to resort to your step 4? Give her a new 4s that will work with iOS6? The other 4s in the household accepted the update without any issue.

As it stands now, her iPhone is virtually unusable...