Fans who went to rocker Jack White’ s concert at Jacob’s Pavilion in Cleveland Wednesday night were told to lock up their cell phones or leave them in the car. It’s a growing trend among artists who are fed up with people taking photos or video and not paying attention to their show. Cleveland.com life and culture reporter Annie Nickoloff says White and others like The Lumineers , Childish Gambino and Chris Rock are using San Fancisco start-up, Yondr .