What is your employer's policy regarding personal phones?

Just recently, my employer decided to enforce a No Personal Devices policy. This means you are not allowed to have laptops, tablets, smart watches, or phones with you during business hours. At the beginning of the shift, you are to turn in your phone, place it in a designated box, and check it out for break or lunch as needed and only use it in a designated area. Does anyone else have policies like this in place in their workplace?

Note: We don't do any kind of classified work that requires clearance or anything like that. The company provides staffing for the healthcare sector