We pay you to work, not to chase the fictional characters and the phone all day.Play during recess or lunch.If not, you'll be unemployed and have plenty of time to "catch them all".
Tighten the enforcement of regulations: Make sure you are not loose, easy to implement during the new rules. Do not give employees any incentives, such as playing Pokemon Go when taking a 5-minute break during the hour, allowing playing but not leaving the room or playing before each group meeting to stimulate creativity. . If you are not adamant with the rules, you have created a gap for employees to break the law.
Managers, first of all, must be exemplary: In order to prevent the phenomenon of employees who love games very much and forget about work, first of all, managers, leaders, team leaders . must be exemplary . They must be the ones who do not play games during working hours, do not drag, invite or have any indication that they are also "Pokemon hunters" outside the office. If this is not possible, the staff cannot "obediently" abide by the rules set by you.