How to locate a stolen iPhone?

Look for your device on a map

To find your device, sign in to iCloud.com/find. Or use the Find My app on another Apple device that you own. If your iPhone, iPad, or iPod touch doesn't appear in the list of devices, Find My was not turned on. But you can still protect your account if Find My was not turned on.

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

Don'ts

If you remove the device from your account after you erase it, Activation Lock will be turned off. This allows another person to turn on and use your device.

An example of my iPhone 5 is given in the GIF below. There is no "Undo" after you remove it from your account.