Im on my second refurb. When i'm on phone calls and try to end a call, i look at my screen and notice that the phone is lock. When i unlock the phone, i notice that the phone is on the home screen while i am in a call and i have to navigate back to the call. Isn't the phone suppose to stay on a call screen the whole time during a call? The phone also disconnects some of my calls randomly and i just hear a "beep". I use to think it was the other persons phone, but it's not. What is the issue here? My refurb that i sent back last week had a bad proximity sensor. Could this one have the same issue? How is that possible?!!!!