If he meant a phone OS that only works with internet, that is a big no. XBox has already jumped the shark with this and other OS's like Microsoft Windows are s

If he meant a phone OS that only works with internet, that is a big no. XBox has already jumped the shark with this and other OS's like Microsoft Windows are slowly warming up the frogs in this direction. If he needs a reason then require him to first get all his vehicles modified to iPXE boot. No internet, no go.