How I can find other iPhone with my device
how can I find another iPhone when is lost?
Question marked as
Best reply
Use the Find my iPhone app on your phone to track the location of the other phone.
If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support
If this is not your phone that you want to track, you would have to sign into Find My iPhone with the other person’s ID and password on your phone in order to find it.
Is this another phone set up with your Apple ID?