i lost my iphone and how can I find my iphone by imei

Apple does not use the IMEI to identify an iPhone. Please follow the instructions below to try to locate your iPhone:

Find your lost iPhone or iPad with Find My - Apple Support

You can’t. Find My is the only way to locate it.

Technically, the carriers can do that, but they require a court order to do so, which is usually only issued if someone’s life is in imminent danger.