I've had enough of this crap which keeps on switching screen modes during a call. I use this proximity sensor that turns off the screen when the phone is on ear to avoid unwanted actions but this sensor sucks so hard that buttons get pressed, calls get cut in the middle of discussion, new numbers dialed and so on. Samsung designs shit, it's that simple. I don't think the newer models have any more advanced sensor than this. My friends that have iphone have never complained about anything, everything works flawlessly for them. We can conclude that Apple designs premium stuff, although the same specs might be more expensive. Just if I wasn't to be into Android development in a few months, I would've sold this crap long time ago.