Open Find My on another Apple device or go to iCloud.com/find
Sign in with your Apple ID
Select your lost iPhone from the device list
View its location on the map
Play a sound if the iPhone is nearby
Enable Lost Mode to lock the device and display a contact message
Mark the device as lost if prompted
Check the last known location if the iPhone is offline
Turn on Notify When Found if available
Contact your carrier to suspend service if needed
Report the device to local authorities if it was stolen
Change your Apple ID password if you suspect account compromise