I can see somebody&#x27;s phone starts ringing or otherwise making a noise and they can&#x27;t get to it to turn it off.<p>I play chess and phones are banned from events (they sometimes have metal detectors at the door of large tournaments). Which causes a problem if you don&#x27;t have a nearby car or hotel room to leave them in. Although recently they have tweaked the rules to allow phones to be in your bag (turned off).