Phones stay off the floor during service. Pockets, lockers, behind the bar in the designated drawer. Not in your hand. Not on the back bar. Not "just checking the time."
A phone in your hand reads as disinterest to every guest who sees it. Even if you're checking a recipe or texting a coworker, the guest reads it the same way: this person is not here.
Two phone glances per shift is roughly $28 in lost reads — guests who would have ordered a second round if you'd looked up and made eye contact.
Emergencies, cleared with the MOD. That's the entire list.
See the Corrective Action Framework.