My coaching locked nearly 400 phones

At first they just recommended to get it locked if you feel like it's a distraction from prep and after they suggested to willingly give your phone to parents and buy their cheap 10k Lenovo tablet. Few months after they did a ptm session, adviced the parents to get their child's phone forcefully locked and buy them the tablet. Most of the people fell for it and got their phones locked and there were people who didn't want to get it locked but still did it to not feel like an outcast. This gotta be a peak marketing strategy, made fool and money out those innocent lads.

Also in the locked phone only coaching's offical app and phone caller works nothing else (there aren't even the system apps and even no notification panel) some devices were compatible with the software they were installing, others were just ruined, there device is fucked up.