I can't finish my phone conversation.

Hey everyone,

My problem is that I can't finish my phone conversation in Iphone 6 64GB iOS 8.3. I can't do this in two situation. One of them is that I can't finish despite of clicking on red receiver. I can see that it seems to be 'clicked in' but it doesn't have an influence on the phone. Next situation is that my proximity fuse doesn't react on changing the position and I have to click on home button to turn on the screen. I have to accent that in second situation when I turn on the screen I can finish a call and also I use Moshi iVisor Glass. Thank you in advance for your response.