How many times have you left the house or work and gotten to your destination only to realize you forgot your cell phone. Well I have done it many times until a few days back when my Model S reminded me. Last Wednesday I parked the car while on a Bluetooth call. Next day I got into the car and was about to drive off to work but the Model S console told me it could not find my phone (most probably because it was on the Cell Phone screen. I got back out and went and got my phone. How good a feature this would be if the car always reminded you if it could not detect your phone before you drove off?