Stolen iphone

Ik this isnt probably the best place to ask but i wonder if there is any way to locate stolen iphone, my little sister got her iphone stolen and they turned it off. Any idea what to do?

no

wait for them to turn it on

find my device and finding evidence of you buying it solely depending on if robber is gonna try and resell it or scrap it and sell those parts if you at any point get his location call the police and give them all the info you can give

Mark as Lost on iCloud.com/find If your iPhone or iPad was stolen, the first thing that you should do is put your device in Lost Mode to lock it. It's important to mark your device as lost as quickly as possible

use the apple find app, you can type it in google and access it with the apple/icloud account
there u can lock the phone and access the location