I have the iPhone 4. It's been having the proximetry sensor problem since I've had it in 2010. I have apple care, and they just replaced my phone twice in the last week....BOTH new phones still have the problem (mutes calls, ends calls, etc) This is getting way too annoying, I've dealt with this problem long enough. My friend has the 4S and his has NEVER had a prox sensor problem. Also my 3GS never had this issue. So, will apple give me the 4S since they can't give me a phone that doesn't have this problem?