Lock your missing phone screen, send a message to appear on the phone screen, wipe the phone or device, make the phone ring to expose the thief or hear where it's.
Find it location & navigate to your device with help of Maps.
See the network, also see the battery status.
The phone will ring very loud even if in silent & many more.
Check your IMEI if blacklisted, blacklist, check phone status & manufacturer, country of origin and IP address.