If you see this, flag down an employee, tell them you don’t have your cell phone, and make them get the item for you.

Yes. Get staff on-board with you, against hostile policy that wastes everyone’s time. ‘I drove a sale that may not have happened otherwise, simply by humoring the customer’. Everyone wants to feel productive, regardless of love for the work.

Then when you go up front to check out, say nevermind and leave.

No. Now you’ve got them on-side with management, because you wanted to be a smart-ass.

Do you even psychology?