This means the app doesn’t have to be installed on your missing i Phone, i Pad or Mac.
The good thing here is that Find My i Phone is actually a cloud-based service by Apple.
The app is only another way of accessing this service to locate your i Phone or other Apple devices.
If you own an i Pad or a second i Phone, you can also install the app and try to locate your missing device.
If you’re on i OS7 or a later version, a feature called Activation Lock will prevent anyone from doing any of the mentioned things without your Apple ID password. Here’s what you need to do: Head over to and log in using your Apple ID credentials.