Hi everyone, I apologize if this has been asked before; I did a search and couldn't find the issue. If I get any notification (iMessage, email, WhatsApp) while I am on a call, the iPhone's screen lights up and doesn't turn off until I manual activate the proximity sensor again (I take the phone away from my face and bring it closer again). I usually realize this when my phone feels quite warm against my face. I've had this issue for a while. I had it on iOS 8 and even after updating to iOS 9.2. It's been over a year since I bought my iPhone, so I'm thinking Apple won't be too kind to me either. Any help? Thank you!