Cathay Pacific (and HKG CAD) - allow the use of mobile/PDAs "as long as they are in AIRLINE/FLIGHT MODE".
Its seems different regulating authorities have differing opinions - yet again!
The chance of a mobile actually interferring with Aircraft Navigation is real.
I work at the pointy end and when the skippers mobile phone rang (prior to start) his Flight and Navigation screens flashed, the Warning Page of the aircraft system (Airbus ECAM) went blank and Autopilot disconnect alarm sounded.........the autopilot wasnt even engaged!
Trust me you would not want all this to happen at 300ft on approach in bad weather (and that is when it is most likely!)
My advice to ALL Cabin Crew is please, if in doubt, please, get them to turn it OFF.
Merry Christmas