content: You would be surprised.  Companies brought this on themselves.  Depending on the job, companies may expect that you have a personal cell phone and will want to use it for certain things.  My company pretty much requires one if you have VPN access because the token app is Android or iOS only.  SO I have to have my phone with me if I will possibly need to bring up VPN at some point in the day (not uncommon).  Some places don't really have your own desk, you just sit with the rest of the people working on the same project this week.  That means you have to have some kind of phone for calls and such.