Or because you might have to use your work email on it, and exchange forces you lock your screen if you want to sync emails. Company policy so that you have a b

Or because you might have to use your work email on it, and exchange forces you lock your screen if you want to sync emails. Company policy so that you have a bit of security in case your phone gets stolen. Not everyone would have a robot to try all the PIN numbers just to steal you funny-cat-pictures-work-emails.