How to find IMEI number through Serial number because phone last

Even if you have the IMEI number Apple will not help you find your lost phone. Neither will your cellular carrier. It’s all on you and whether you had set up the Find My app properly before you lost your phone.

Hello,

The IMEI number won't help. Your options are included in this link:

If your iPhone, iPad, or iPod touch is lost or stolen

Good luck.