Angels Repair Center's crews fix broken smartphones, tablets, computers, and gaming systems, replacing shattered glass, mending malfunctioning buttons and charging ports, and switching out busted batteries. They also pass on their knowledge to others during repair-training classes, which can be taken by everyone from aspiring technicians to customers who simply want to learn how to restore their devices themselves. The classes teach such concepts as microsoldering to repair circuit boards and Galaxy smartphone glass removal and gluing.