All of us have been faced with the irritant situation in a theatre or restaurant when the mobile phone at the next table suddenly goes off. And you jump up like a cat scalded by hot water.
Most mobile phones come with facilities of a vibrating mode.
But majority of people feels that they are too important to follow such trivial rules. Once a play had to be stopped and the actor-director had to virtually insult a person in the audience and turn him out before many more people actually switched off their cellphones. There is a solution at hand. I recently read that Fan Shaing Electronics of Taiwan has manufactured a device that prevents mobile phones from making or receiving calls in a room or small building. According to the manufacturer, the device can disable mobile phones upto 15 metres away.