Use the phone’s built-in location sharing feature
Check Google Maps location sharing
Check Apple Find My for iPhone
Use the carrier’s family locator service
Ask the person to share their live location
Use a trusted messaging app with live location sharing
Check call logs or messages for location clues
Use reverse phone lookup services
Contact the mobile network provider
Report a lost or stolen phone to the carrier or police
Use device tracking tools if you own the phone
Enable location services and tracking before the phone is lost