I’ll stick to my personal phone only, thanks.
No 1) no, I don’t want you monitoring my communications and/or internet use, ever
No 2) no, I don’t want to leave all my business contacts I’ve made while I’ve had the phone with you when you force me to quit and/or fire me
No 3) work life balance becomes much more difficult on weeknights and weekends.
Made this mistake once, about 5 years ago. Burned bigtime in no 1-3. Haven’t repeated it since. If it’s not a job requirement, no thanks!
Same with a company laptop.