Hi there, after being told by geniuses that the camera was broken, I jailbroke the phone on the recent ios break and used iCleaner Pro and Cleaner.
However, I would say the bug in the ios seems to mean that whenever caches are rewritten, the front facing camera on the iphone 4S ceases to work.
I just tested front camera now and it works! (But that's no guarantee it'll work later!) Enclosed pic is my mugshot!
My camera stopped last night. I have done everything I could find on how to fix it & nothing. I never got the apple care plan when I got my phone 2 years ago. I called Apple & they want me $19.95 to speak to someone. I was going to hold out to get a new phone when the 6 comes out. However, if this is the way they are going to treat the customers who buy & promote Apple products...FORGET it. If anyone can offer up any other way to fix my phone before Monday please let me know.
I have a 4s that also suddenly had problems with the camera. I encountered a black image on initial startup of the camera app. I tried a number of solutions on this forum with no success. What did finally fix my problem was kind of strange. The solution was simple. First I turned on the flashlight by activating it from the quick menu. While the flashlight was still on I activated the camera also from the quick menu. The flashlight turned off and the camera suddenly began working correctly. Don't ask me why. I just hope this saves some people some time and money.