Can you track an iPhone 4?

A person can track a missing iPhone 4 through iCloud and the "Where's My iPhone" app. It is important to remember that iOS 7 must be installed on the phone and the iPhone activation lock must be turned on through the app.

Signing into "Lost Mode" also allows a user the ability to mark their phone as missing and to set a password; this is so that the phone can't be used by other parties. They will also be able to track the phone with this feature as long as the missing phone is turned on during the tracking process.