Yes, you can also use your Apple id to lock it permanently, then the only way it can ever be used again is if you unlock it using the Apple id.
If you lose your iPhone or think it might be stolen, these steps might help you find it and protect your data.
If Find My iPhone is turned on, you can use it to find your device.
If Find My iPhone isn't on, change your passwords and report the device as missing.
If Find My iPhone is enabled on your missing device
You can use Find My iPhone to find your device and take additional actions that can help you recover it and keep your data safe.
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