I understand most of you don't fly Ryanair, so no one mentioned this, but last week on a ryanair flight they had a new sign to switch on and off the mobile phones, basically you can switch them on during the flight, not take-off or landing. It's free to receive texts, but you pay for everything else. So while, it is possible that mobiles may interfere with 'something' during take off and lading, now everyone can use their mobiles without restrictions during the flight, so I am guessing there really is no interference.