Finally a trip with a 100% success rate. Until now, I was stuck at exactly 50%.
6/28 UA835 ORD-PVG pmUA 772. The Purser sent my wife to ask the Captain who immediately said yes.
7/11 UA 836 PVG-ORD Polarized pmUA 772. My wife asked the Captain who was outside the cockpit who also immediately said yes. It was still working for the 20 minutes we had to wait for a plane to leave the gate that we were supposed to use (although in the end we got a different gate).