Useless P990i fact for the day.
The flip sensor is a little magnetic switch on the right hand side of the screen at the top of the closed flip. So when you put it into your case with the magnetic clip on the front, the phone thinks you are opening the clip then closing it again. That is why the screen comes on every time you try to put the phone away and not because you are pushing any of the buttons. Tune in tomorrow for more exciting trivia
( A geobar for the first to guess what my latest toy is.)
( Hint: It was upgrade time on my phone contract!)