The screen on my Galaxy note 9 times out and goes black during a telephone call. The screen then becomes unresponsive to the touch and will only come on when the other person hangs up or when I touch the power off button. I cannot hang up.This happens when speaker phone is enabler or when I have the phone to my ear. This does not seem normal. Can anyone provide me with insight on this? I just got the phone 3 days ago. Any help appreciated.