Normally when I have incoming call, even when the phone is in the locked mode, I still could hit the button, and be able to talk.
Issue: This happens some of the time, when I have incoming call, I hear the phone ring, but the phone was "black" like it's in the lock mode. I couldn't even see who is calling, I couldn't even talk when pushing the button like I used to.
Please tell me what's wrong?
thanks.