For precise, live movement tracking, most services require an app to be installed on both devices to ensure mutual consent and privacy.
If you only have a phone number and no app access, you can typically only find the (city or region) and carrier, not a precise live location. Phone Tracker by number - Apps on Google Play Tracking Phone Location By Number
If you have lost your phone, standard OS-level tools are the most effective and do not require a separate tracking service. For precise, live movement tracking, most services require
: Use the Find My Device hub to ring, lock, or erase your phone remotely. live movement tracking
: Many third-party apps offer "anti-snatching" or whistle-to-find alarms to help recover a misplaced device. 3. Identifying Unknown Caller Origin