None of this makes any sense. In modern smartphones, the PCBs (i.e. the parts that get hot and contain the sensors and other components) are usually screwed int

None of this makes any sense. In modern smartphones, the PCBs (i.e. the parts that get hot and contain the sensors and other components) are usually screwed into the frame without any glue. Only the battery, display, and back covers are glued in. This makes repairs of the most commonly damaged parts much more difficult without providing any functional benetfits.