I think the whole thing is based on miscommunication. iPhones are a status symbol and also they deliberately make them incompatible so it is a logistical issue

I think the whole thing is based on miscommunication. iPhones are a status symbol and also they deliberately make them incompatible so it is a logistical issue for someone in a group to have an Android phone. They probably are not exactly bullying him, it's just that they are treating him as lower status and not fitting in because he has the wrong phone. He used the word "bully" to try to help you understand that this was a significant social issue for him. Having the non-Apple phone signals less wealth, lower social status, makes him unavailable for significant communication channels. I personally have never owned an Apple product. Mostly because they seem like a waste of money and aren't developer friendly. Luckily I have no friends anyway and am not a kid in school so it doesn't matter.