I bought a Ram mount for my iPhone, the sort that goes on the yoke slider thingy. I used to have a sucker job that fitted on the screen but the window blew open on the a/c I was flying and sucked the phone out of the cockpit. Luckily it landed in a field and I was able to retrieve it using 'find my iphone' before the battery ran out. I didn't want that to happen again.