Apple guidelines on what you should do if your iPhone or iPad is stolen.
Apple has a support page explaining what to do if your iPhone is stolen, and it has now updated this page with more detailed advice.
This includes a new section warning of potential scams and advising against entering contact details to display on the stolen device…
The key information that stands out - don’t display your contact information if your device was stolen:
While you might see an option to enter a phone number or message about how to contact you, this information is helpful if you've lost your device and want to make it easier for someone who finds your device to get it back to you. If your device was stolen, the thief might use your contact information for social engineering schemes.
Great document that deserves a full read and one you should have on hand - saved on all your devices. Follow the steps in order, but hopefully this never happens to you or any loved ones.