Taking a few precautions will protect your data and can even help you find your phone if it gets lost or stolen.
7 Things to Do If Your iPhone Is Stolen or Lost
There's no guarantee that these tips will protect you in every case or that your iPhone will recover, but following them will help reduce your overall risk.
The first thing you need to do is protect your personal information. If you have a passcode set up on your iPhone, you’re pretty safe. But if you don’t have one, or want extra security, use Find My iPhone to lock your phone and add a passcode. That step will at least prevent the thief from using your phone.
If you can’t get your iPhone back or it has sensitive information on it, remotely erase the phone’s data. Erasing the data may not prevent the thief from using your iPhone, but at least they won’t be able to access your personal information.
