How can I lock my lost Iphone ?

Here is how to Mark your device as Lost:

When you mark your device as lost, you remotely lock it with a passcode, keeping your information secure. This also disables Apple Pay on the missing device. And you can display a custom message with your contact information on the missing device. 

➔ Mark your device as lost.

More information on ➔ what to do If your iPhone is lost or stolen.

Axel F.

Start here: https://support.apple.com/en-us/HT201472

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