Doubt that there are bullies in school anymore, because kids nowdays spend more time in mobile, playing Minecraft, PUG or "whatever is popular now".
Better educate children not to laught on other "different" looking people (like cerebral palsy, cross-eyed, excess weight and etc).
Smartphones won't change anything. Its just another way to bully a child with low-end smartphone and brag about iphones parrents bought them