How to track an iphone with no icloud through imei or serial number

It is not possible for a user to track an iPhone using the IMEI or serial number.

Your carrier can track the IMEI, but they will usually only do this in emergencies, such as a missing person. Even then, the carrier will still require a court order to proceed.

The only possible way for a user to track an iPhone is by using Find My......assuming that Find My was enabled on the phone......beore.....it was lost.

Find My - Official Apple Support

FindMy is the only user-accessible technical locating means available from Apple.

You don’t.