I see so many employers these days that are allowing the staff to call the shots. Sit your employees down. Remind them of the policy. Tell them that texting and checking texts is in fact using a cell phone and will be grounds for termination. Some kids can’t live without being plugged in to their friends or the outside world. But you need to teach them what that paycheck represents: they need to be plugged in to your business while on the clock. If they don’t like it or can’t live by the rule, then you must terminate them. Simple as that! Stand firm.