Glowing screens at concerts can be annoyingly distracting and disruptive. New SF-based start-up Yondr aims to fix this by
removing phones from the equation. They plan to give specially made cases to
all show attendees, which will lock the device once it's entered the designated phone-free area. If the user receives a call or text, they can leave the no-phone zone to regain access to their device. If only it blocked obnoxious dancers too.