The speaker on the back of this phone is powerful enough to ensure that even those in the back seat will know exactly what the courteous and friendly omniscient navigator is telling you to do.
When I lost my diary and iPod on planes, I did the same thing, telling the airlines exactly what seat I had been on and on which flights, but I never saw those items again.
"They may need an air steward just to show them exactly where the life jacket is underneath their seat... and just describe to them how to put it on, " she said.
No-one bothers with locks: you could pretty much leave your wallet and keys on the seat, return a couple of days later, and they'd be exactly where you'd left them.