(Discussion of moderation removed as required by the Términos de servicio) but they rarely provide a useful answer. "I'm sorry your phone slapped your dog. Nobody wants that to happen. Lets try some basic troubleshooting steps even though you clearly indicated that you tried them a week ago when you posted your message."
FWIW, proximity sensors are often quirky. The one on my phone (not a Note 3) often decides that my hand is a face and blanks the screen as I try to enter numbers during a call. I have to make sure that my fingers and thumb are curled as tightly as possible so my bear paw doesn't set off the proximity sensor. I don't know where the sensor is on the Note 3 but maybe you've got a finger over it or something. Just spitballing.
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