Call the phone from another device
Use a device-finding service like Find My Device or Find My iPhone
Check recent locations in the phone’s tracking app
Look in common places where you last used it
Retrace your steps
Ask nearby people if they saw it
Check under furniture, in bags, and in car seats
Use a smartwatch or connected device to make it ring
Check silent and vibration settings
Contact your mobile carrier if it may be lost or stolen
Lock the phone remotely if needed
Report it to local authorities if necessary