No problem if the employer provides the "phone" and restricts the usage to the time and place where you are doing the work you are getting payed for. Then it's

No problem if the employer provides the "phone" and restricts the usage to the time and place where you are doing the work you are getting payed for. Then it's even ok to track me down to the meter in real-time. With no obligation to take it along with you to the restroom or to keep in on you while you're on a break. Not like a short normal coffee/smoking break, but when you're officially clocked out. Install something on my phone? Definitely not.