I have an employee at a small IT company that's always texting during our Daily Standup meetings. It's very visible that it's personal, not work-related.

We're totally fine about doing personal stuff at work, but I don't like that it's being done during the only 10 minutes a day when we're all supposed to engage each other as a team.

**What would be the least intrusive way to ask an employee to avoid personal texting during standup meetings?**

The options I've considered include:
 - Discussing group norms without singling anyone out, but if everyone knows, that can be embarrassing. 
 - A "casual" mention can go wrong, if they don't realize how obvious it is and prefer not to bring their romance out. 
 - Asking them not to use the phone, but that's using power, and I want to reduce our power distance, not increase it.