Hi and welcome to windows central.
Log in to your Microsoft account, (
https://forums.windowscentral.com/e...icrosoft.com%2Fen-us%2Faccount&token=xML7eDxE) . navigate to " Devices" option onscreen after log in and you could see your device registered and visible with last known location in the map over it. Click on your device (lumia 520) and choose the option to find my phone. Next you will have 3 options
:>Ring
:>erase
:>lock
You can choose what fits you, but do remember You must use the account associated with your lumia 520.
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